although I've moved onto a WRX from my SVX, I can still miss her and post my experiences...lol
My svx had a Flowmaster 80 series muffler 'camaro style'. IMHO, leaving the resonator is a better choice with any exhaust setup, as all the modified svxi that i heard with it removed were far raspier than my setup, no matter what the muffler. I highly recommend what I had done (for sound at least) which was: a 2.5" pipe all the way through with the stock resonator into the flowmaster 80, and out through whatever tips you wish...the sound was quite nice and smooth, very low below 2k rpms, but porche flat six style scream up high in the revs. Member to ask that can attest to this would be SVXfiles, and Chiketkd, and mimmsey.
Good luck!
and just as an opportunity to ***** what my current subaru sounds like (i love my subies) i will post a clip :P
http://s232.photobucket.com/albums/e...nt=WRXVid1.flv