Sweetie, men HATE receiving clothes for Christmas, that's something that his mom would do!
Buy him a DVD that he likes, a recently released video game, or a CD.
You can never go wrong with electronics. An mp3 player would be a great option (nowadays you can buy them pretty cheap), a new cellphone is a good idea too.
Men love tools. Yeah, I know what you think, that they are boring gifts, NOT for men! (boring gifts for a men are, well, clothes). Buy him a saw, a pressure washer, a fancy flashlight! I've seen a pretty awesome swiss knife with a memory stick drive incorporated! Believe it! I think that would make a great man gift.
I hope this helps, Good luck