I don't think it matters which choke manufacturer you use as long as you are pleased with the pattern. I shoot an Xtrema 2 with factory choke tubes. I reload my own HS (12g/cc) loads with 1 3/8 oz of hevi shot, muzzle velocity of about 1400 ps in a 3 inch casing. There are about 316 pellets of #6 shot in my load. When I tested at 40 yards, 30 inch circle and a modified choke I put 242 pellets in the circle. I tried with improved cylinder and placed 218 pellets in the circle. I have been using the IC since for hunting and have been amazed at the results.
Whatever tube or shot size you use you should pattern your gun, it can be a real eye opener.