Low end RG35XX is good, especially with garlicos. If you find a good deal you can get a NDS lite and a flash card for 50 bucks and have DS, gba natively and emulators for nes/gb. On the highend Steam deck beats everything in my opinion

https://github.com/Lime3DS/Lime3DS/releases

Or get it from flathub

lime is the most promising fork. Most of the other options are even less different or don’t even have binaries. Do you have any specific things missing from lime3ds? If not I would just use it

Anbernic RG35XX for everything up to gba and my steam deck for everything else + couch co-op