
Logitech G
G600 MMO Gaming Mouse
MMO button beast, but discontinued and double-click prone.

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I have the Aerox 5 Wireless Diablo IV Edition, and it fits like a Deathadder but with a lower left-side hump, and I find it quite comfortable. The 5 side buttons are nice for certain games. Basilisk v3 Wired is a solid choice, should fit like a glove, lots of buttons. (I have the v3 Pro)
Deathadder v3 hyperspeed is narrower Kysona Uranus Pro is a Medium sized ergo Kone Pure Ultra clone. I do love the finger grooves for locking into it. (58g) Aerox 5 Wireless is similar to Deathadder in hand, but with less left hump, which I find comfortable.
I have the Steelseries Aerox 5 Wireless Diablo IV edition, and it's a DAv3 with a lower left hump, and very comfy to use, so I appreciate your Rival 300 feelings.
Well, if you are looking for wheel and button reliability, the newer mice use optical switches for the mains, and the latest ones use an optical encoder for the wheel. examples: Razer Cobra Hyperspeed and Deathadder v4 Pro. Many of the modern mice use dust-free wheel encoders if they are not using optical. An example of this is my Kysona Jupiter Ultra, which has a TCC Gold encoder, and Omron optical mains. I have the Aerox 5 Wireless Diablo IV Edition, and it's a comfortable ergo, with a lower left side hump than the Deathadders. The five thumb buttons are nice for some games. Note all switches are mechanicals, so it will inevitably doubleclick, but this hasn't happened yet. (1 yr 3 mo) RGB does kill the battery quickly. Another way of looking at it is to buy mice that are on the cheaper side, and just get a new one when it goes bad. Example: Kysona Uranus Pro. Uses Huano 100m mechanicals, a TCC encoder (forget which) and 3395 sensor, and the shell is a copy of the Kone Pure Ultra in a medium size. It cost me $42 on Amazon, in Orange. Comes with 8K dongle, and when it develops an issue, I won't feel bad.
Have you looked at the Steelseries Aerox 5 Wireless? I have the Diablo IV Edition, and you may like the 5 thumb buttons, as it offers a place for the thumb to grip. It's an ergo similar to the Deathadder, but with less pronounced left hump.
I have the Diablo IV edition, which is an improvement to the looks, but hard to find these days.
Worst mouse design ever, the right side is slick and slopes upwards, you can't easily pick up the mouse to rest in center of mouse pad.
Still sloped wrong and refuse to support them for such a dumb design
i have got a steelseries aerox 5 wireless. there is a aerox 9 wireless which has more buttons than the 5. it all comes down to personal preference.
Rival 710 > Rival 650 Wireless > Aerox 5 Wireless > Xlite V3 > X3
Some Keychron mentions here already, but SteelSeries mice also come with a USB C dongle. I used my Aerox 5 off and on with my Macbook Pro (I bounce between a couple different mice) and it was fine. Using it via Bluetooth is also surprisingly usable. The GG software is a little bloated and annoying if Sonar decides to randomly take over all your audio, I just use LinearMouse to handle mouse settings on MacOS.
Glorious Model 2 Wireless or the Aerox 5 Wireless, enough buttons, wireless, Type-C, rechargeable.

Logitech G
G600 MMO Gaming Mouse
MMO button beast, but discontinued and double-click prone.

VXE
Dragonfly R1 Pro
Lightweight value champ, but small with some QC issues.

Hitscan
Hyperlight
Ultra-light for small hands; 8K dongle sold separately.

Logitech G
G502 HERO High Performance Gaming Mouse
Durable, many buttons, adjustable weight; prone to double-clicks.

Razer
Viper V3 Pro
Lightweight, adaptable shape, high performance; scroll wheel issues.

Ranked #1
Razer - Viper V3 Pro

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Teevolution - Terra

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Razer - Viper Ultimate

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Glorious - Model D Series

Ranked #1
Logitech G - G600 MMO Gaming Mouse

Ranked #1
Razer - Naga Trinity