I had a 2005 allez specialized and I LOVED it. I bought it used, it has a 50cm frame, replaced the tires/seat and it was the best bike I've ever loved. It cost me altogether about $500 with the fixing up.
I need a bike comparable to that one... I might get another job to help pay for it if I have to go a bit higher on the price but I can't go too much over that.