I didn't find SFBs exciting at all(my opinion, though). Also note that with its taper(LINE taper, meaning a few inches and barely gets skinnier) the effective edge on groomers is shortened. Oh and both these skis are on the medium/soft side if I remember right. Get 190 Rubies over 188, they are still not too stiff. Better yet, get S7s.
Nah, when I was 5'10" I was on 194s and I was under 160lbs. The 190s are just a little straighter(2mm?) and a bit stiffer. Go to TGR/Tech Talk/Ski Review Links Thread/ Moment and you can look at reviews of the 190 and 188.