I'm one of those people that gets fixated on things, and I end up just having to buy them.
I feel your pain bro. Don't delay the inevitable, just buy it, lol.
I was in the same boat, had the Vita, was really excited for remote play and some Vita games, and it just collected dust, the lack of triggers and the hand cramping made it unplayable for me.
I picked up the New 3DSXL a few months back, I was looking for something I could play around the house in any location and in bed while my wife watched tv or nursed (newborn baby in the house). I can tell you it's light years better than the Vita. Assuming you love Nintendo games. I am fan of the Nintendo collection so I was excited for a new large library of games.
It is also much more comfortable than the Vita, that being said I still do get some hand cramps sometimes, not nearly as often though. Below is a link to the grip I bought which is nice. Hope this helps.
New 3DSXL Grip from Amazon edit: if you do get this grip, on the amazon page it says there is a newer version, that was available when I bought mine but I passed on the newer version, it looked smaller and I felt the one I linked would be better for cramping.