You'll be lucky to get your hands on a 02 enduro frame cos they sold like hot cakes. The 03 model enduro is supposedly going to cost about £900 for the frame alone - specialised have realised what a bargain the 02 enduro frmae was.
I've heard good things about the Dawes - not a pimpy bike but supposed to ride well, a good bargain.
About the Giant XTC frame: I rid pretty ard ona hardtail, would the Giant be a sensible upgrade? I'm looking for something fullsus, not too active - hated the enduro ride, liked the Trek Fuel but not enough travel. Giant XTC has 3.75"?