
Segway
Ninebot Max G3
Durable hill-climber; heavy with limited range.

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I have the same issue and have owned over 10 scooters in the past few years. I have sold all but two. Both Vsetts one is a Vsett10+ dual motor beast but only weighs 80lbs. The other is a Vsett8 single motor and I use this for short trips to the store. Both are over 3 years old and I have never had a problem with either of them. I am also a decent scooter mechanic and do all my own modifications and repairs. In the price range these scooters have no equal. In the USA I purchase my Vsett scooters from RevRides out of Washington state from their website. A quick search of the website will reveal everything you need to know.
I rode a Vsett 8 for a couple of years. It went from being a commuter tool to mostly for fun now. I can’t recommend it. I had to stop riding because of the amount of close calls I had; drivers in this city are unhinged. If you’re considering getting one I’d recommend an E-Bike instead.
Kukirn has some solid options in that price range but honestly their water resistance can be hit or miss depending on the model. If you're coming from esk8, you'll probably want something with decent torque and acceleration - the G2 Pro might be worth checking out since it's got that aggressive feel you're looking for. For wet weather riding, I'd actually lean toward looking at the Vsett 8 or maybe even stretching for a Blade 10 if you can find one on sale. Both have way better IP ratings than most Kukirns and the performance is there for someone used to electric boards. The family aspect is tricky though since most high-performance scooters aren't exactly beginner friendly - might want to grab something with different ride modes so you can dial down the power when others are using it.
Having had quite a range of scooters and tire sizes I can say that being "nimble" isn't as much the size as it is the width. A Segway g30 is 10 inch but not super wide (can never remember the exact width) and feels really nimble. It's actually a really nice city scooter if you don't need to go too fast or climb major hills. Also sucks that it doesn't have suspension. A vsett 8 is an 8.5 inch (again, can't remember width) and is also pretty nimble, but the solid rear tire is a major pain, if you clip a rock or height variation in the road/sidewalk it will fully shift the rear tire out and feels pretty dicey. The vsett 8 was a pretty decent scooter, it got the job done even though that solid rear tire almost got me a couple times. A punk rider pro is 10 inch with 3 inch width and it starts to feel a lot less nimble. The fact that it's also longer and weights closer to 30kgs also adds to the lack of nimbleness, but it's way more stable and I was actually quite happy doing 50km/h on it. Right sidewalks were not my friend though, the road felt much better. This was a great scooter, not great suspension (rubber cartridges) but heaps of fun, only got rid of it so I could go the speed limit on the road. My current Teverun Fighter 11 is 11 inch with 4 inch width and it's not all that nimble, it's much tougher to lean and kinda unweildly on the sidewalk. Weighing closer to the 40kg mark and being even longer the punk also doesn't help for nimbleness (and neither does the steering damper) but on the road, going even 70km/h is a breeze (top speed is 85km/h but still need to find a road that is nice and quiet to test that out). So far loving the Teverun, just need to get more familiar with the handling on this beast. Tldr: tire size (height) is definitely not the only factor when looking for a nimble city scooter. (Or any scooter for that matter).
I was in the same boat until I bought my bike. Well first I got a Vsett 8, which taught me i dont NEED a car. Then i got my motorcycle license and have never looked back. Costs me roughly 300 a month and is my favorite thing to do ever
Yeah the Teverun blade GT 2 is solid but that extra $400 hurts when you're already stretching budget lol. Have you looked at the Vsett 8? Think it's right around your price range and the range is pretty decent, plus the build quality is way better than most stuff in that bracket

Segway
Ninebot Max G3
Durable hill-climber; heavy with limited range.

Ausom
DT2 Pro
Budget speed demon with hydraulic brakes; slow charging.

Inmotion
Climber
Hill climbing champ, great value, but lacks suspension.

Segway
Ninebot KickScooter MAX G30P
Durable, mod-friendly value, but lacks suspension; tire changes hard.

Segway
Ninebot MAX G30LP
Durable, budget commuter, but slow on inclines and no suspension.

Ranked #1
Inmotion - Climber

Ranked #1
Inmotion - Climber

Ranked #1
NIU - KQi Air

Ranked #1
Segway - GT3 Pro

Ranked #1
Segway - ZT3 Pro

Ranked #1
Segway - Ninebot Max G3