I have superbike bars on my 750 and for me, much better that then the stock bars. I also have used them on a 550, too. My current 550 has "M" bars with a lowered seat and rear sets. My rear sets have the pegs the same height as the stock pegs, but further back.
Everyone has a different shaped body and the stock setup is OK for most people. Try them and find out.
Steve