Excluding JRPG and the types -- Castlevania, Ace Combat, Adventure Time(the 1st which is a Zelda 2 like clone), Cave Story, Code of Princess, Pinball Hall of Fame, Bit Trip Saga, both the FF Theaterhythm games, Ridge Racer, Asphalt, Samurai Warriors, both Resident Evil games, all come to mind as a decent cut of variety from the third party world that maybe worth looking into. I don't know your tastes but there's a good spread of genres there.

I just don't see the New 3DS going DSi where there's like 4 games, no advertising, and it's just a shittily handled crutch to last about 2 years before something better shows up. The only realm of possibility I see there is that the system bombs so astronomically hard that third parties pull a WiiU on it and give it the bird after the first year forcing Nintendo do run out another system in a hurry. Supposedly the advantage of the New 3DS depending on taste may or may not be as 'wow' as color was. You get a 3D image finally that doesn't tear apart at the slightest angle which is the only reason I don't use it much at all. They've got a double clocked and twice to four times the ram looking to go into it, other parts upgrades as well which will allow the hardware to pop out stuff at over the level the Wii was capable of making it a pretty impressive handheld. I'm not sure it'll come up to the Vita in quality, but it's definitely not just a minor bump. That added horesepower going on there would make it fairly enticing for developers to at worst use it as a spam box to shove last generation games on there as a cash-in and if you were just a Nintendo tool who avoided the PS3/360 and Vita it would be fresh releases if that happened.