I had a RIA 1911 in 10mm, loved it just wasn't overly impressed with it. Was sweet because it was a 10mm and not the price of a delta elite! Ended up trading it for a springfield GI model, sweet shooting gun and 10mm is a little hard to find and expensive!
I am building (with the able assistance of AllenM of course) a custom 2011 in 10mm.
Have found some good ammo at fair enough prices.