Cowboy Bebop has the best dub ever but hopefully you've already seen that. ;)
And yeah RahXephon is great. Paranoia Agent is definitely one that you should check out. Samurai Champloo. UM. If you like weird <img src="/xxx.gif"><img src="/xxx.gif"><img src="/xxx.gif"><img src="/xxx.gif"> than Texhnolyze is awesome.