I did a few digital downloads too, it's convenient but they are not really in your face up front about your inability to switch 3ds devices. I read that you can transfer the games somehow but not sure.
I think Pilotwings is fun as hell. I wish they had a good Chess game though. I kinda wish Nintendo would have quite the console side and stay focused on hand helds, the potential is there but of course might be too expensive if they made it with better specs.
I hacked the original PSP-1000 and it became the best handheld ever. The only way megaman 2 was meant to be played. I don't know if my Vita can be hacked as easily but I'd do it in a heart beat again. NES/SNES games are meant to be played on a handheld, and the Vita/PSP has a perfect screen for them.
It's a little slow in some emulation, especially snes, you can tell some differences between it and the actual console.
I have the PSP 3000, I had to use the overclock to 333mhz but sure, it's not bad at all and it's nice being able to play PS 1 games on it.