Honestly mate I've been following retro game corps for about 2 years now and I was a backer of the AYN Odin - I pulled out because despite it being the best android handheld (as the Odin 2 now is) my phone with a controller (I'm using a gamesir X2) is as powerful (minus the battery life).
But I wanted a bit of an all in one, something with a decent screen for if I wanted to watch movies on I could, and something that could emulate all the way up to switch with ease.
Considered a switch but they are a fucking ballache to jailbreak as such, to jig it you need a proper early one pre 2018 model iirc, and the cost of the hard mod chips for those later than that are extortionate and absolutely not for the faint hearted for fitting. Genuinely hard modded OLED switches go for about £400 and at that price point your near steam deck OLED money which is a full blown pc.
If you aren't looking to spend the earth I'd look at the ayn Odin 1 over the RP3+, you can pick them up on eBay for about £170 or new from Ayn for the same, possible taxes from China but.