That's the cool thing about SPEC....as they custom build them and have several different models with different characteristics. Give 'em a call and tell them what you want, and they'll recommend something.
My GV is at 137,000 miles on the odometer. I've had much bigger tires on for a very long time....so in truth, it's probably more like 142,000-145,000 miles. Still on the OEM clutch, but the pedal's out quite a bit before it's engaged, if that's the proper terminology. Don't know how much more is left. Now that I'm regeared with 5.12 diffs, should be easier on the clutch. I think I'll have that SPEC in by late spring 2008, whether the old one goes or not.
BTW, don't forget to order the extras for the clutch job. I ordered an OEM Suzuki pilot bearing, release bearing and rear main seal to be done at the same time as the clutch. I guess you can have the flywheel cleaned up/reconditioned if it's in good shape, but since I'm keeping my GV long term I bought a new Suzuki flywheel as well. Pretty expensive, but I did it for the peace of mind.