GFS is one one of my favorite suppliers EVER. I have gotten everything from tuners* to Floyds. How do they sell cheaply? Wal-Mart mentality....VOLUME. I really think most of the stuff they sell is/was intended for OEM use. I mean if you mind they import company that makes pups for say Turser or Indiana guitars and you could probably buy stuff for pennies on the dollar. Throw in some custom stuff just for GFS and you have a winner. Also, I must say the Customer service is amazing. I have placed several orders, none have taken longer than 3 days and all but one was perfect. The one that wasn't a set of tuners got left out. With one e-mail and and on hour later, I got a reply with a shipping confirmation and an appology.
As for the tuners, I happen to have used 3 sets of the Kluson style tuners and I give them a thumbs up. While I prefer the split post of the original they are are just as smooth and reliable. And on all sets I had to order the adapter bushings as they went 3/8" holes (mighty might necks) and they worked perfectly.
Even the Floyd Rose is great. Granted I have never played or owned another other than an OEM Charvel it replaced, but I love it and it was an easy fit. I have also used several of the strat pup sets, lil' killers, lipstick tubes, a retrotron, and most recently the voiced 180.
HTH,
R-