Choices?? What to buy?

[bigDogs02GT]

Ok I need an opinion on what Bassani C/B to buy. Should I get the Stainless for $712.00 or the aluminized one for $455.00? I already have the X-pipe and the headers (just havent installed them yet) and want to complete the full Bassani system. How fast would the cheaper system start rusting? Is it really worth the couple hundred to get the SS one? Thanx