Sweet spot for the Nintendo world 100% agreed, but not for portable gaming at large. Nintendo made a lot of concessions on raw power to bring price down
PSP, while more expensive, hit a solid sweet spot between portability and power. It truly felt like you were playing on just a small console rather than a DS which gave the distinct feeling of playing on something "portable"
Oh man yea there was like 3 iterations between the original and the Vita. In the beginning there was not a whole lot, but towards the end there were a ton of games and a lot of bangers. I think there were like 600+ total games released by the end
God of War, GTA Vice City, Burnout, Ace Combat to name a few excellent classics
CFW on the new 3DS XL is perfect for me. I don't need it to fit in a pocket except a jacket pocket, and it has access to all the GB through 3ds games, a surprisingly good battery life, and more importantly, decent quality screens.