Not sure how the eclipse-specific systems are, but I like borla in general. They make a good, deep sounding exhaust and their stuff is really well built. If you can afford borla, I think it's hard to go wrong with them. I had a borla muffler on a lancer ralliart and my brother had one on his trans am. Both cars sounded pretty great. The lancer especially for what it was.
Since you'll have a 4 cylinder like I did in my lancer, I think it's hard to do better. 4 cylinders are hard to make sound good, but borla really puts a lot of effort into reducing drone and farty, high-pitched noises.