Garmin
Forerunner 255 Series
Long battery; but wrist HR tracking is inconsistent.

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I have Epix Pro 51MM, Instinct 3 Amoled Tactical 50MM and Instinct 2x MIP. Based on your budget either get Instinct 3 Amoled 50MM or Get Fenix 8x or Epix Pro 51MM. Instinct 3 Amoled vs Tactical, other then features which are of not much use only difference is tactical display gets brighter and dim more then regular amoled. Buy the best you can afford and keep for years. Garmin is notorious for not updating older models so that's why try to get latest and I am sure it will easily last you 7-8 years with heavy usage.
I switched to an Instinct 3X OLED, and went back to ultra.
Instinct 3 amo Getting 10 days with always on display, always connected to phone for weather.
As a gift, I think it is a good choice. Battery life is fair, you can go out for a 5 to 7 days of travel without charger or cable for Venu 3. In the daily life, I usually charge it once every week, but it can definitetly last even longer than one week. I have Venu3, Instinct 3 AMOLED and one Apple Watch, but my favorite is still Venu3.
I have the instinct 3 AMOLED and it’s been awesome. I received it on August 14th, starting wearing it the 15th and have yet to charge it since. Battery still shows 6 days left which is incredible
No I do the wrist gesture and have it on low light, which is plenty for me and still able to see just fine outside
I love both but after owning the Instinct 2, then owning a Galaxy watch, this time, I went with the instinct 3 amoled. MIP is awesome but I love colours popping on the display, plus the added extras (red shift, font size) are also nice imo. Since I'm not on the sun 50% of my day I prefer low light visibility and would not benefit from solar charging at all. Plus, I have some Gshocks in my collection and my previous MIP i2 was kinda similar in terms of how a watch feels with the monochrome display.
Yes. For that price its worth it. It's a flasghip watch, expected to get features and updates for multiple years. It's on par with the Fenix/Epix line, has all the top-tier features, just a different segmentation. Just to give you an idea, the Instinct 3 amoled tactical also costs like 600 new but that's an a upper-mid tier watch where the Enduro is the top of the line product. For some the 50mm case might be daunting but I also got the 50mm instinct 3 after owning a 45mm instinct 2 and I have to say it feels better.
Garmin
Forerunner 255 Series
Long battery; but wrist HR tracking is inconsistent.

Garmin
Forerunner 955 Series
Best value, clear MIP screen; limited smartwatch features.

Garmin
Fenix 7 Series
Durable, multi-week battery, flashlight; high price, buggy software.
Garmin
Instinct 2 Series
Rugged, solar multi-week battery; bulky, small screen readability issues.

Garmin
Enduro 3
Multi-week solar battery, lightweight; but bulky form factor.

Ranked #1
Oura - Oura Ring Series

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Apple - Ultra Series

Ranked #1
Garmin - Enduro 3

Ranked #1
Garmin - Fenix 7 Series

Ranked #1
Garmin - Forerunner 255 Series

Ranked #1
Oura - Oura Ring Series