I recommend you to take look on GBA catalogue too. Not all, but a lot of games have a better version on GBA. GBA catalogue is pretty big too. In my opinion SNES, PCEngine, Genesis and GBA pixel games hold better these days than Saturn & PSX. I love 2D platform and beat'em up games, there you can find so many great games and gems like Dragon Ball Advance Adventure, Castlevania, Super Ghouls 'n Ghosts f.e.
I posted overhere when I bought Analgue Pocket and not posted here but I got
Retroid Pocket 4 Pro SNES version too. One of the best decisions I recently made. But as pointed it the depends if you enjoy these kind of games.