In my experience with M1911a1's the best ones to buy are the semi-custom like variants. Stay away from expensive custom (race guns) pistols built solely for accuracy, and stay away from Mil-spec models, they are not throated for hollow points, but colt series 70's may be ok.
Here's my list
1. Kimber, yes somepeople do not like them, but i have had less trouble with them then others
2. Colt series 70, combat, Reliable, but i do not like the finish on most colts.
3. Springfield TRP,HRT and similiar models. Springfields are good, perhaps the second best production 1911.-the FBI HRT uses custom Springfields and is availble for sale. they are expensive however.
4. Para Ordanance LDA?, their new DA models are neato, about a 4.5-5 pound trigger pull. the officers model would make a great .45 carry gun.
M1911's are fidgety and not the most reliable pistol you can buy out of the box, but when they do do you right, Wooooooo!!!!

Buy "power mags" for your 1911, stay away from cheap GI mags.
I reccomend Wilson combat mags. Les Bear and Chip McCormick also produce a similiar magazine, but i have'nt tried any. Have had good luck with the Wilson mags.
The chip McCormick 8rd mags that fit flush are sometimes troublesome. For flush mags stick with quality 7 rounders.
Be carefull of used 1911's. I recently bought an old Thompson autoordanance. Some idiot took a file to the disconnect.
liba1