I was wondering if any of you guys use Kettle Bells in your workouts and if those of you that do could help me out. I am looking at buying some but I am unsure as to how many and what weights to get. There are some pretty good deals out there but almost of those come will singles for each weight. For example 1 20lb bell, 1 30lb bell, etc. Would I be missing out not having doubles? Or can you get just as good a workout from using single kettle bells. I also came across a kettle bell handle that works like a dumbell. You can actually load on the weight you want. What do you guys think. Thanks!