Since im focusing alot on Cardio lately I would like to take up skating/ skeelers . not sure what is the difference if there is any. I am talking about outdoor Skates. and I would like the best advice there is or best skates there is because quality counts when your making many milage. I will not take any lessons I have rollerskated alot when I was a child and currently for Cardio I skike alot . any advice for what to look out for ,what to do, what not, size of wheels buying online vs buying in a sports store please as much as you can tell ?