What would make my truck sound better?

I'm thinking of buying an exhaust tip to make it sound roarish! Lol. Should I buy the whole tail pipe or just the tip? And what are some other accessories that will make my truck sound roarish! Lol. I have a 2005 chevy Colorado. And some good websites where I can get some for cheap, like magma.com, eBay.com etc. And some seats that are very comfortable and blue with black. Thanks in advance. Here's a smile to be with you for the whole day! :D