Borla will give you a nice loud deep growl like it does on my cobra...standard magnaflow will give you a nice mellow tone like it does on my 02 GT...the other magnaflow option will be like my borlas with a nice deep growl and loud as hell when you get on it...yet tame when not on it.
SLP is for GM...run away...raspy...not good. Chokemasters are bad...mmmmkay.
I say either Magnaflow if you want to go mellow....or borla if you want loud and deep....just like she said.
Or, you could do bassani which is like the borla only a little bit louder and not as mellow down low.