I have ridden about 3000 miles with pegs and 1000 miles with boards. I started with the pegs and then tried the boards because I thought it would be more comfortable. I didn't like the shift action from 1 to 2 with the boards (I kept the standard shifter) and I couldn't get my legs comfy with the boards (I'm short and squat, so they tended to bow out more than on the pegs which sort of lock them in place). So then I went back to the pegs and things were good for a few months but on long rides, the soles of my feet started really bothering me from the pressure of the pegs so I went back to the boards again, which I have had on the past month. Now I prefer the boards because I can get my feet farther back behind me to give me a more upright riding position and on long rides I have more options with where to place my feet and I've found how to hold my legs so they don't get tired any more.
The other thing to consider is that when riding hard in the twisties, with pegs, you scrape the peg and then your boots can hit the ground but with the boards, the boards just touch down. This may seem like an advantage to the boards but gawd, is that board scraping noise aweful compared the the sound of just a peg scraping, not the mention the whole thing folding up on your foot is very unnevring.
I have heard lots of good things about the switchblades and I was looking at getting a set of Kuryakin Iso pegs with stirups too - best of both worlds, but I worry with the adapters they may stick out farther which would decrease ground clearance even more. Let the sparks fly!
