Personally, I like Thomson or Race Face Diabolous stems. I've got a 50 mm RF Dia on my DJ bike, and a Thomson 90mm (if I remember right) on my Enduro.
I'm going to try out the RF on the Enduro just for fun. I'll let you know how it turns out, but right now, I'm liking the 90 on it, so I may just leave it.
Don't want to stir the sheet pot too much!
L8R
__________________
"Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming, "WOW, What a Ride!" - unknown
"Your Bike Sucks" - Sky Yaeger