Flowmaster Super 44 or Super 10?

[brian's 77]

I have a 77 gmc swb and have a magnaflow muffler on there now but its not loud enough. I dont drive it that often, hardly ever but Im in the process of fixing it up and I want to get a really nice sounding agressive tone. Im not too concerned about cabin drone and I want to do a dual exhaust out both sides by the rear tires. Does anyone have either of these on thier trucks that has input on what these sound like? I heard sound clips on youtube but I really couldnt tell. I want my truck to sound agressive at idle and even more aggressive at full throttle.

Thanks!