REV Twin pipes or pipe and silencer combo?

Im looking to get twin pipes for an 800 rev. Not sure if the sled I get is going to be a powertek or just a regular h.o. Are the twins for the rev real finacky or is it not so bad when you find the right jetting. What are some different brands of twins for the rev chassis. Would I just be better off by getting a Dynoport Big Core Barker pipe with an HPS silencer or what? I like my sleds loud so any help here I would appreciate. Also I do alot of my riding in around the 700 feet elevation and my sled would only be a 121. Thanks