HuskyDeac, feel free to post restaurant recommendations. My wife has been to Barcelona before, but I have not, so we are open for any suggestions...
I was traveling on the cheap, so my choices probably wouldn't be what you're looking for, but I'll send a message to my friends for some recommendations. Any type of food you're looking for?
La sagrada familia. Do it. There will be a big line but go in the morning. No one I went with wanted to wait on line so I did it alone. It was the coolest manmade thing I've ever seen.
Walk la rambla a few times a day. It's so neat. Eat gofres (waffle and ice cream) numerous times.