I LOVED the Xindi arc. Enterprise at it's very best.
Yep. By far. The whole season built up nicely, and then BOOM. Space Nazis. Top that.
Space Nazi's..... so bad, that when I few weeks ago someone lent me season 4, I skipped the first two episodes. I should've skipped TATV as well..... other then that, season 4 was good.
*EDIT* Allthough I applaude every scene with Orion women, "Bound" should be made illegal.