Got a link? Is it actually specific to your inline six-equipped vehicle or is it for a V8?
Either way, I'm convinced on spending the extra money on a nice exhaust system. I have a cheapo exhaust on right now that the previous owner installed. The welds are marginal, the bends are frighteningly cramped and the whole system is welded together (though the summit setup probably wouldn't be like this) Its fitment under the car is also not clean. Also, it's under 5 years old and it's starting to corrode (California's mild weather)
Spend the money, get Mike's system. It will be quality, and you'll support a smaller business (which will benefit you and I)