DC Sports Any Good?

Hey, I have another exhaust conflict. I dont want to order the wrong thing. I was going to get an Apexi WS, but then I decided that I wanted something that was 100% Stainless. I was looking at the DC Sports Cat-Back Exhaust. Is this better than the WS? Will it add HP and increase MPG? What does it sound like? Is it really loud? Deep sounding or a Beehive? I was also going to get a High Flow cat to go with it, is Catco a good brand? I think that I am going to hold off on the headers for now. Thanks for your help!

TWN