I have two of the Uncle Mike's Kydex holsters for 1911s, one a belt loop model and the other a paddle. I like them and would recommend them. They work well, and the tension can be adjusted to hold the gun firmly while you are running around or moving, and still release easily for a draw. They have a big sight channel so that the front sight doesn't scrape and hang up on the draw. I haven't tried any other Kydex holsters, but I prefer the Uncle Mike's to my $80+ leather holsters.
Note that the belt loop holster positions the gun about one inch lower than the paddle holster. I suggest that you try both of them in a gun shop to see which placement you prefer.
The paddle holster is a bitch to get off unless you remove the large block that fits below the belt. I almost have to take my pants off to get the paddle holster off. I haven't tried the holster with that block removed, but it comes off with only one screw. No problem with the belt loop model, though.
Be careful with the tensioning screws. There are two of them, and they should be adjusted carefully so that they have equal tightness. If one is looser, it may work out and be lost, along with the T-nut it screws into. That happened to me with the Uncle Mike's mag holder (although it has only one tensioning screw - the botton assembly screw came out). I wrote to Uncle Mike's, and they sent me a replacement screw and the T-nut. The screw is easy to replace, but I couldn't find the T-nut anywhere local.
I then Lok-Tited all of the screws in my holsters and mag carrier and have had no more problems.
Midsouth Shooters Supply has the belt holsters for $12.55, the paddle holster for $14.43, and the mag carrier for $12.82. I think those are real bargains, but regardless of the price, I recommend the holsters and the mag carrier.
OOPS! Edited to correct placement difference. The belt loop on the "belt loop" holster is about one inch HIGHER than the paddle, so that places the gun about one inch LOWER! I think that's what I mean!