I have several 1911's, and I use mainly Wilson mags. I do have a few Chip McCormicks and a couple Kimber Tac Pro mags. If you are buying new mags, Chip McCormicks are the best "value", but I buy all my mags used off ebay or message boards. I can regularly find Wilsons for a third off the new price.
I do this too. You can find Wilson's on the cheap. I think I paid 20 apiece for the last 47d's I bought still in the package.