you can have a good "rump" if you want it, but that rump is just wasted power and fuel. Some of the bet street machines have a near stock idle quality. To get that rumble with a blower you can simpley narrow your LSA to 106 on a cam and run about 10 degrees more exhaust duration than intake. something with about 218/228 @.050" with a 106 LSA and a blower would give you a nasty sounding idle and an indescribable amount of mid-range torque.
Be warned though, you will loose about 25% of your precious MPG's. And yes, I overlooked your edel heads- sorry about that.
a lot of people pick a cam for sound, and there's nothing wrong with that, however the best sounding and the best performing cam are two different things.