Hmm....Yep, Cowboy Bebop's good too, as is Outlaw Star. Never seen Excel Saga. Ever seen X/1999? Evangelion is great. You should see it. It's not stupid, mindless mech combat, but instead, has lots of talk of religion, science, the way people think, all that shed monkey fur in a hand drum.
I kinda dislike Gundam Wing, though. It's become to little-kid's pop culture. Original Gundam is better, not so munchkin. Regular old Gundam doesn't have ridiculously powerful cannons that destroy entire cities.