Flowmaster exhaust or muffler?

[DC Quick]

I'm looking to upgrade my Explorer a little. But I'm curious, which one is better? Flowmaster Exhaust System Force II or Flowmaster 40 Series American Thunder Muffler(w/ an exhaust tip)? Do any of you have one of the two? And if you do are you satisfied with it?

 

[DeRocha]

Check out the following threads for related info..

Flowmaster CAT back install
Flowmaster 40

 

[Sams01XplrSprt]

I got dual 40 series flowmasters on my 01 sport and i love it.