I have the floor standing dual drive tube roller from Stakesy's and I love it.
The only draw back with it is a) 14" dia is the smallest it will roll to. b) it takes about 20 minutes to change from one size of rollers to the next. I now have multi groove rollers to cut down change over times, but you can guarantee the next rolling job in will be the size of rollers I have siting under the bench.
My custom made rollers are all from EN8. set A has 1/2", 5/8" & 7/8" grooves. My 3/4NB- 28.9mm also has 8mm, 10mm & 12mm grooves and I also have 21.3 or 1/2"NB and 33.7 or 1"NB and at the moment I have two sets of rollers being machined for me and these will be 1/4"NB (13.72mm) and 1 & 1/2"NB (4826mm) and 3/8"NB (17.15mm) and 1 & 1/4"NB (42.16), and then in the not too distance future I am going to have a custom made adjustable die for square section up to 50 X 50 box.