you can take the blade out and make it a shoe then you some wheels nail them on and walla you got roller blades or you can buy covers for your skates with wheels and that would work but the easiest...
the easton stealth s15 with tblade's is the lightest possible top of the line skate. with out the tblade holder the skate is sub 700 grams lighter than than the Bauer 190's at 720 grams for a size 8...
The best roller skates come from Reebok. They are really comfortable and the pumps do work.
Right now I am using the 9ks. Also CCM makes great skates. Don't get Mission's are really...