There are quite a few threads regarding this topic, try a quick search to get opinions from others as well as this has been discussed many times before. But since you asked, here's my two cents..
I'd say to wait up and get the "new" version of the Larue cantilever mount with the locking lever. Hopefully they'll be out soon
If you can't wait, the KAC, PRI, or ARMS will all serve you well. You can also try your hand at "hunting" on the EE for a used LT mount.
Basically it all comes down to two things...
1. what your intended use is, Haji-huntin' duty weapon, range shooter or safe Queen.
2. how much $$ you are willing to spend on a mount.
I've used KAC's and ARM's mounts for quite awhile, no problems with either brand of those Aimpoint mounts. Be aware of the methods of construction of the mounts you are considering, MIM'd, screwed together parts or CNC'd billet. CNC'd billet beats MIM any day, but usually at a cost.
I've yet to have a problem with any ARM's mount that was "properly" put together i.e. Loctite...that's MY experience, but I have seen instances of failures with MIM'd throw levers.
YMMV, remember the old saying..."you usually get what you pay for"
HTH