Frank,
I have found that most all fruit woods are good to smoke with. My experience with peach is that it gives a slightly sweet flavor and is not strong. I have used it in both my ceramic Grill Dome and water smoker (no longer used since the model 55 CS). I dried the peach wood for almost a year(the tree froze out in 2001) and I then eliminated any bark with green moss and mildew covering it. It would be good in the model 55 - good stuff.