If you had to choose one, a 06 kfactor on ebay (http://cgi.ebay.com/NEW-Kuota-K-Factor-Complete-Triathlon-Bike-Size-Medium_W0QQitemZ180061247623QQihZ008QQcategoryZ64681QQrdZ1QQcmdZViewItem) or a leader 330tt frame built up with veloce and mirage crank and brakes, which would you choose? why? I’m worried about the height on the headtube on the kfactor. i have heard its tall. I have a very aggressive riding position being 19 and flexible.
Get the Kuota, and if need be, an adjustable stem. Tall head tubes happen, and there are many ways around them 
Chris