Dougs are just as nice and less money. Uncoated ones are around 425, coated about $550. If you use the summit 10% off coupon, even less.
The step is worth about 4-8hp on a 350hp engine, less on a lower HP set up, and will cost you an additional $150-200 coated vs. dougs coated. It's one of the most overrated sales pitches in exhaust for these cars.
I'll buy Dougs over tti every time, seeing as I have cars with both.
There are other excellent fitting options out there other than the higher priced brand.