Good post by ratz. That cost estimate is good, and would yield a VERY nice setup. At a given budget amount you are then only paying for (less) weight - literally counting grams - and start to pass the point of diminishing returns (my opinion of course)...
Wheel choice will play a big factor in the total cost as well.
If there is interest in getting a fully built up bike, please contact me. Thats what I do here.