I use both carbon arms( 2 FSL 8s, one older, one newer) and taccom (6 up, 4 up, just ordered the 16 up belt).
love both. best value goes to taccom but u save more belt space with carbon arms
disclaimer: I'm not a pro and have only shot a match but I've been putting in a lot of practice time at the range and reloading dummys off my belt