Yup, agree'd. Unless you're tough on forks. I only have 1 biking friend that weighs 150lbs though. Most of the people I know that ride are 180's and SID likes to flex for bigger guy's. Those bigger tubes on the Reba @ 3.5lbs is tough to beat.
If you're doing XC racing on NORBA (Nearly Off Road Built Area's) courses then SID or Manitou R7 is it. But, if you wanna get a little funky and do a small-medium drop or jump around a bit...Reba, Fox Float, Manitou Black Super Air (very light for a bigger fork).
I have actually tossed around the idea of getting a SID for my HT, but I just can't justify replacing a Pilot SL for a SID as easily as a Reba or Black Super Air.