850onBrink

I replaced the original cat couple of months ago in my 95 850 turbo with an aftermarket downpipe(DEC). Now I am think I need to replace the rest of the exhaust(the cat back). The car now has 108000 miles and wanted some ideas on what my options are on replacing cat back or the whole system from the turbo back and is worth to spend money for high performance system at this age of the car. I know people have a lot of different systems on the 850 but i am not sure where people buy these systems from ..., i was wondering if people would be willing to give me some input on my options that I came up with below. I need to know which of my options make sense or i am wasting money. I have broken down my options and questions as follows: 1. Get a high performance cat back and attach is to the existing aftermarket(DEC) downpipe..I am not sure what size my current aftermarket downpipe is ?. will a system like IPD, engstrom, eurotuning, SS or Ferrita work with this after market downpipe. 2. replace the complete system fom down pipe to the tip with one of the above vendors. 3. just replace the cat back with original volvo part... 4. Should I get a exhaust from a local exhaust shop or am i looking for trouble. i think some over here are vendors selling down pipes and exhaust ..if you can give me an idea for what would be best suited for my requirement.that would be good and a price too.. 5. can i get a list of contacts for looking into Supersprint and Ferrita systems.. thanks for your help..