I just bought the Summit fully welded 2 1/2 offset inlet/2 1/2 center outlets for 35 each and I was VERY pleased with how they sound. I had Dynomax Super Turbo's before. To be perfectly honest, I needed to replace them due to holes in the mufflers and it sounded like butt, so I went the cheap way out for the time being.
I am so pleased with these that I may upgrade them to the Stainless Steel model (they are about 65 each) in the near future.
webracin