Scottish Elises

With an S1 Elise factory manifold and Exige backbox, is there any advantage to fitting a sportcat rather than a standard? I have a feeling it will just make more noise rather give than any appreciable performance improvement. Plus it's getting on for 3 times the cost of a standard cat...perhaps better to put the money saved towards a Larini or 2bular backbox?
Cheers
Harvey

Just read Tut's comment in the manifold replacement thread Think I'll go for a standard cat and save my pennies for an exhaust upgrade sometime.

Or queue up for a Sabre Heads Stage 1