I just sold my Vita via Craigslist today. I met in person and got cash. I put that money down for Luigi's Mansion 2 and Monster Hunter 3. The 3DSXL is awesome and worth it. The line up for this year is great. As for my PS3, it keeps collecting dust. I have a Wii U and an Xbox 360 and I never touch my PS3 except to watch blue rays. I am very disappointed in the PS3. If you dont play either the Vita or PS3 enough then I would get rid of both and get a 3DSXL for sure. You will love the system and games coming out on it.
Fire Emblem for the 3DS is such a great game....need I say more