I own Crusader's ancients rules ("Crusader") but have not had a chance to play them. I do like them, though. Not too far off the Warhammer model, but with some changes that I've always wanted to see (d10, combining toughness and armor into one resistance test, etc.)
He has a playtest copy of fantasy rules up on the web page too. Downloaded them but haven't had time to read yet.
As far as those Mantic humans,, I think they look better than the Cadians. Plus they are generic enough for non 40k use. If they turn out as good as they look so far, they may be my first Mantic purchase.