I agree, The Roush Axle backs sound amazing, I have them on my car and love it. It's quiet when cruising but sounds amazing when you put your foot down... Not sure how much they cost, but look into them, they sound great...
Completely agree. I love the roar of my roush axlebacks.
I have the track pack (brembo) wheels but they where powder coated gloss black by an outside company. I think they are durable and seem to shine up real nice! Buy a used set and have them painted, may last longer that way. Also, I think borla or gt500 AB sound great on these cars. Heres a link to a local owner selling a brand new set of borla s-type AB:
For a few bucks more you could always get the stainless works retro catback. I've been on the fence myself about buying it and giving it a try! I currently have the borla ATAK CB which sound great too.