TexasCHLforum.com

I'm no 1911 expert, but what I've read on the forum the most affordable 1911's out there are:
Rock Island Armory(a.k.a. Armscor)
Springfield Armory
The Taurus 1911

The 1911 Forum is a great place to pick up ideas on new and used 1911's:

http://forums.1911forum.com/index.php" onclick="window.open(this.href);return false;