Here's my concert list (No certain order):

Nickel Creek - possibly the best accoustic concert I've
even seen.
Dream Theater - (all 3 times were incredible)
Opeth - the tightest "metal" band I've ever heard.
Wynton Marsalis - jazz at it's finest.

and my "Want to see" list:
Porcupine Tree
Radiohead
Gideon's Press - incredible band from Austin