i BELIEVE the 2k4 Specialized Allez Elite is $999 w/ full 105, but it's Al frame...cf seatpost and cf fork. it rides very nice, but i the annoyingly loud freehub kinda turned me off to it. definitely worth checking out

also, you may be able to find a 2k4 Trek 2100 for that price. Front deraileur is Tiagra ($30 or so to get an ultegra FD) but the rest is 105 and/or Ultegra. Aluminum frame, with CF seatstays, cf seatpost, and cf fork. I went with the 2200 (same frame) and I absolutely love this bike. Very smooth ride, but a good degree of tactile feedback from the road (personal preference).

Melloboy