The VX is now looking the part and i want it to sound the part

I want a nice deep tone, reasonably loud but no rasp. I have heard a few peoples VX's on youtube and they have a nasty rasp to them which i wouldn't like at all.

I love the sound of my V6 300zx and want something similar (i know there different engines and the zx is turbo'd eliminating alot of noise)
http://www.youtube.com/watch?v=IzDDY...eature=channel

I went to a custom exhaust fabricators yesturday and they want £600 for a cat back system!! which is way too much for me. I was thinking of just replacing the centre box with a universal straight through one my self but is it going to sound raspy and rubbish?? Or an nice V6 burble?


What is the stock exhaust diamiter??? ( i would check but i took the tube to work cause im out for drinks after )