Virgil Tripp's Cobra Mags are the absolute, hands-down best 1911 mags made.
Wilson 47Ds are excellent. I've never worn out one of their polymer followers, though some have.
If you're wanting to "roll your own", I recommend the all-steel Metalform convex followers (available from Brownells) with Wolff, ISMI or Tripp springs in the mag bodies of your choice, or Virgil Tripp's new "mag upgrade kits" (follower + spring). I've made these up with Metalform, Baer, Wolff, CMC and Wilson mag tubes, and they all work with complete reliability.
I've had WAY TOO MANY failures with the CMC Shooting Star mags. The Devel-designed angled-leaf follower is VERY failure-prone, IME, and will often ride forward after the last shot, thereby making the mag hard to remove, also frequently failing to feed the last round and failing to lock the slide back after the last round.
I've also had troubles (magazine tube expansion with feed-lip spreading) with the new Wolff magazines, and won't be buying any more.