RJM713 beat me to it....I thought I would be the first to sing the praises of the humble RIA. I, too, got mine for under $350 and it's a tack driver! I bought it in part because I wanted to try my hand at gunsmithing. I changed out the grip safety, trigger, sights and hammer. Not because I had to -- but because I wanted to.
Here are some "before and after" photos of my Rock:
I plan on using it for some USPSA 1911 Single Stack competition in the near future (when I find the spare time!)