I just bought and had installed a "sport" muffler (single round canister, 4" tip, angle cut)from Vibrant performance. I have to say, for $100, this muffler is a huge value.
The build quality is nearly perfect. The pipe itself looks fantastic. As for the sound, it is quite good for such a cheap pipe. Obviously, the sound will depend on your personal vehicle. I have a 1.6L Daewoo Lanos, with an intake as my only other airflow mod. I am very impressed by this product from a company I have not heard much about.

Thanks for the tip. (pun intended!)
It was not so long ago that a 'cheap' universal muffler was a 24 inch glasspack from Thrush for $29.95.