If I were in your shoes, I would consider a 9mm 1911 solely as an economical shooter. I would ditch the idea of 10mm altogether. It's not that the 10mm isn't a good cartridge, but I'm really of the thought that the 10mm can't do anything the .45 won't do (or even the .40 S&W for that matter).
For example, and I'm not saying it's flat out "better" than anything the 10mm can offer up, but a 250-255gr hardcast under some Power Pistol will leave a 5" .45 ACP at 1,000 fps. It's one of my favorite heavy .45 loads, and will drop game quick. Want more? Take up loading the .45 Super. I load for it and I'm impressed. From my 5" barrel, here's what I got so far, mainly using Power Pistol and Longshot:
200gr JHP @ 1,350 fps
230gr JHP/hardcast @ 1250 fps
250gr JHP/hardcast @ 1200 fps
275gr hardcast @ 1150 fps
I've got some 300gr LFNGC's coming, and while they're mainly for the .45 Colt, the profile should be ideal for feeding in my .45 SUPER. Now to me, those numbers are better than the 10mm. I had several 10mm's including a 1911 but sold them. I hope you have a good source for 10mm brass, as the last time I checked, 10mm brass wasn't exactly easy to come by right now. Just my .02.
Last edited by 45BBH; 06-02-2013 at 12:39 PM.