I've got a magnaflow and the stock cat and resonator. I like the sound. Deep (for a 4 cylinder) and not tinny or raspy or too loud.
My muffler shop just cut off the old muffler after the final bend and welded on the Magnaflow and a double walled stainless tip.
Looks and sounds great for $175.
What's a Supersprint? about $600? How much better could it sound? 3 1/2 times better? I don't think so.
Oh, and I drive a cabrio, so if it's not too loud with no top, its going to be fine with a tintop.