Chub, you need to check out the Dan Wesson guns (if you haven't already). They make their basic 1911 model and their Commander Bob-tail in a 10mm and they have recently reintroduced the Razorback due to popular demand.I see.
Well, I've been wavering between a .45 and a 10mm, lately. Admittedly, I think the .45 probably has a slight edge on the 10mm in "stopping power," but the 10mm generally offers more rounds in a platform of similar size.
Right now, the battle seems to be between a Springfield XD45, and a 10mm 1911. A lot of people would insist that your first 1911 should be a .45, but I just see the 1911 government and the 10mm cartridge as a match made in heaven.