I bought a 3DS (original, black) months after buying my Vita. I found myself not playing with it as much, despite getting it after my Vita. (I like my Vita so much more. No idea why it's bashed all the time. Guess it's just ignorance...?)
Anyway, once the XL came out, I've decided to take the upgrade and trade in my old 3DS...
I had the choice between Black/Red XL and Black/Blue XL, and I've chosen Red. It was a rough choice, it really was! Hahaha! I almost chose Blue. I kind of regret it - but I guess that's just because of the fact that I don't own the blue one, and it'd be considered different to me haha!
Its not ignorance its the quality of the software titles, the Vita is definitely the better handheld but there is nothing to play on there mine has been gathering dust while i play my 3DS all the time. Vita as tons of ports from other consoles that i dont care for i want original games then my Vita will get more play time as of right now the 3DS is far superior.
As for which 3DS model i have its a Black on Black 3DS XL