Are you wanting a classic 1911 45, or just any 45 like the Glock, XD, M&P, etc?
Aside from the Rock Island's you'd probably have a hard time finding a good new 1911 in the $500 price range (people seem to like the RI's just fine though).
There is the Remington 1911 thats around $650, and from what I can tell handling a couple at the counter they're nicely made. Very tempting.
The Glock 21 and 21sf (smaller grip) sells for $539 new in my area.
I like plinking around with mine, and the Glocks lend themselves easily to nice inexpensive aftermarket parts if you want to change/lighten the trigger feel, amongst other things.
Last edited by Dashunde; September 13, 2012 at 11:12 AM.