The C14 has more than enough ground clearance unless you plan on going off- road. Clearance isn't the issue -- it's turn-in.
OK.
Speaking for me, 214 pounds nekid, figure another 15-20 pounds of riding gear, 30-50 pounds of whatever and an unkown weight for the pillion. SWMBO has 6 cubic inches left of storage space and has decided that she needs to stop at wally world, she just cant let that space go to waste. Sitting there silently is a bump, just waiting to rip off the shroud surrounding the oil plug. See my point? I also do the track twice a year, no, she aint a track bike, but she is what I have. I push the limits of the chasis and motor, mine as well. I reserve the really fast stuff for the track BTW. Based on these two scenarios I find additional clearance nice piece of mind. I havent tried the '55s yet, but my next set will be the Angels with that profile. If I dont like em, I'll go back to the '50s, Angels of course
And it isn't easy to argue against having a more accurate speedo. Trust me, GPS lag sucks.