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 recommend it, but I do love the Trails series in general. Cold Steel II is often considered the weakest in the series, and honestly it does have some serious pacing issues. A weaker Trails game is still a good game overall if you ask me, and it's worth it so you get to Cold Steel III.