Hi,
I'm 6'1" and about 14st, 33yrs,- blue eyes, etc, etc, etc... and fit the superlight fine for a few hours. Last year I did quite a few 300+ mile rideouts with the BHC mob, and a run down to Le Mans, and could only complain of a bit of numb bum!
The only noticeable problem is the narrow seat. If you replace it make sure the new one is just as high or you'll find your legs scrunched up.
As for prices, I've already seen two fine examples this year for around the £2700 mark. Try to get one with sub 15k miles on the clock, but a mint example is always better than an abused low miler. I've spent about £250 on mine in a year (belts), change the oil myself, and have ridden it flat-out for 6000 miles without trauma. I hope to keep it forever, but could be persuaded to swop if someone with a 888sp4/5 had a fit and wanted to swop!
Any questions, just ask.
Cheers,
ali