Performance exhaust for 5.4 triton on 2000 ex eddie bauer

I am about to replace all exhaust system on my 2000 expedition. Actually I was thinking about performance exhaust. Does anyone has any suggestion or maybe some links to good products. How difficult is to replace it. I need to start from exhaust headers. Thank you.

have a '97 with the 5.4, went with a 3 inch cat-back flowmaster exhaust, also use a K&N with the airbox opened up, and use a superchips re-programmer, seems to work pretty good, alot of variables you can play with on the retuner.and sounds pretty "throaty"
hth
Rick, Ore