Im only 5'9 so I know how you feel. If you lower the whole bike it shouldnt than much differntly, but at stock height I drag my pegs all the time when riding hard, if it were my bike I would leave it stock height.
2002 954RR
2001 ZX6R (stunt bike)
http://home.sc.rr.com/minytrker/bike.htm
2002 954RR
2001 ZX6R (stunt bike)

http://home.sc.rr.com/minytrker/bike.htm