I have Dragons Crown installed on my 3, and the 5 just shipped so I'm gonna wait for that to see how it runs.
I completely missed the Vita as a system, never so much as touched one. What are your favorite games on it? Bonus points if it's not graphically intense and doesn't take too much power.
I'd pick emulating the ps2 versions of god of war directly since the retroid 5 should be able to handle that. The vita ports have really really bad audio quality among other issues but the audio is just....
All good input, I just knew they existed