If all your current cans utilize the YHM mounts, you know you'll have to pick and choose which ones will use the different mounting system for the Specwar. If you're wanting a smaller can, have you considered a direct thread? The Gemtech Trek is selling for $295 from Phoenix Distributors and IMHO is a great can. They sell out quickly but they get them back in stock fairly often.
GEMTECH - TM-TREK SUPPRESSOR - .223 [1/2X28] [NIB] : Silencers & Suppressed Firearms at GunBroker.com