Well I am a little over $1200 but I think I am going to come in around (hopefully under) 20 Lbs. $950 (shipped) for Ultegra Triple build kit from Colorado Cyclist and $280 for a Salsa La Raza frame (ebay) which is 853. I think it is doable.
Here is one that will be close as well. I think I have seen the number for this bike right at 20 lbs.