Definitely Wilson mags. If you plan on carrying the Colt, I would suggest changing out the springs and followers to convert the Wilson 8 rnd to a 7rnd. MUCH more reliable.
Wilson has a good rep. but I have no experiance with them..
I have had bad experiances with "Chip Mcormick Shooting Stars" though some people love em'...
I hate to be such a contrarian but I reccomend good quality 7 round mags..if your Gonna buy the wilsons anyway do give them a good work -out before using them for anything but the Range (as with all products)...