awesome!
when i lived in michigan, i had a custom exhaust made for my turbo. all 2.5" stainless mandrel bent with compnents i selected from mail order (summit racing). i bought a 3" bullet muffler (2.5" in/out), a 2.5" "'U" bend, 14" stainless turbo muffler (i believe dynomax, stainless) and a 3.5" polished stainless tip. the shop i went to specialized in hot rods, but they were pretty cool and liked the idea of doing a car outside their norm. iirc, the total for EVERYTHING was about $375 with $90 being the part the shop did. the welds were awesome and so was the sound.
i sold it to someone i knew when i sold the turbo off. he loves it and still gets a lot of positive comments about it. the fact that it only bolted on in one place (after the cat/test pipe) was awesome (less chance for leaks). they were able to compensate for the car being lowered and nothing ever hit the car or bumper.
i think custom is THE way to go.