anyways.. i was going to say always hmf over big gun.. ive seen personally big guns blow out the end on trail not even kiding.
go with a hfm swamp if you do any mudding ! gl
and if you want noise go with swamp xl "extra loud" its a shorter pipe and gives a slight bit more flow .. obv dependent on intake!
The Big Gun has nice sound and is an in-expensive way to get it. I currently use it on my 850xp. I have also used the Hot Seat Performance and it is nice as well, but is in the same price range as the HMF if not a little more. If the budget is not an option I would have to agree that the Muzzy is a great system.
I have the Big Gun series on my Teryx and it is obnoxiously loud, i tried the extra noise reducers you can put it, recently repacked it and still stupid loud. I think when i find more time im gonna bolt the stock exhaust back on. I would sell ya mine CHEAP!!!! but pretty sure it wont fit in the Brute.