[SPOC] exhaust + turbo

[Ostrix]

Ok i am planning on getting a turbo and all, but I need new exhaust first.  I really like the SPS muffler, but it only comes available with a 2" inlet.  I want 2.5" cat piping for low back pressure, so I'd have to get an adapter.  Does anyone think i should still get the SPS muffler?  or should I just get some other one with a 2.5" inlet opening?  What do you people with turbos have on your cars right now?