Yeah, New Luigi U is exactly the same game as New Mario U, it's just backwards and harder (or something like that). I liked both newer Mario games a lot but if I had to pick one, I'd go with Mario World 3D. It was a TON of fun and more interesting overall IMO.
I recently sold my PS3 but aren't dying to get the PS4 just yet. I want it for Fifa15 but that's about it. I don't see a new GTA coming out soon so I might wait until a few more games are ready for it. Wii U should hold me over I suppose. Thanks Russ!