To provide my "credentials" for the question at hand, I have had a Vita since launch and I've been actively borrowing (and returning, of course) my friend's 3DS for the past year-and-a-half.
I really like the 3DS. The games it has are generally quite fun, and it has a pretty vast variety. The quality of the first-party stuff is really high, and the 3D works fairly decently beyond a simple novelty
But, also, I really like the Vita. I've played more games through on the Vita, and have generally had a lot more interesting and "bigger" experiences on it. Where I would regularly play 20 - 40 minute sessions on the 3DS, I have absolutely had multiple 4+ hour sessions on the Vita. It feels more like a powerhouse.
I think the fact that you have PS+ is actually quite huge. About half of my library is games I've gotten for free on PS+ - and I haven't even played through all of them, yet. The ones I have are great, and I gladly would have paid for them (wipeout, gravity rush, thomas was alone, and a few others). Also, I do plan on getting a PS4, so for me it makes sense to stay with the Vita.
tl;dr - I personally recommend the Vita a little above the 3DS, but both systems are great at what they're aiming to do.
Just as an update, I working on this - I've just been working a little slower than normal due to some stress coming from multiple projects and University classes. I will keep you all updated as it moves on.
So far: Created the drum layer, have cut up a lot of "Hey everyone, it's tuesday" clips and am working on how to make it sound smooth. I am also experimenting with different synths (Sylenth1, Access Virus TI2) to try and get a really hip sound.
I'm in the process of cutting up some bombcasts to extract the "Hey everyone, it's Tuesday" to use in a new Bombcast theme. I don't intend to fill this thing with a ton of quotes, or anything; but I did want to ask what you guys want out of it.
I'm thinking of doing a hip hop flavoured thing, with synths but also live guitars like the original.