Seriously guys, GROW UP.

Slinging matches between workshops are uncalled and should be kept as _PERSONAL_ opinions and not generic recommendations.

I've been around to a few workshops, at the end of the day they all make mistakes. Its human nature, both RMS and Speedworks have helped me out when i was in a jam and i honestly can say that i recommened both.

As for exhausts..

Best to just go and listen to each one then see what your personal tastes like best.

X-Force is a mass produced china spec exhaust (to my knowledge) and some people think its not even worth using as toilet paper, other's think its the bee's knees.

I personally have a RMS spec exhaust and really like the sound of it. I dont know much about its manufacture (maybe someone else can fill you in on that stuff) but thats some fuel to the fire i guess.