I don't see how anything could stripe better than a Steiner or Ventrac deck. The roller on the back is huge and it looks like the whole weight of the deck actually rides on it.
The Exmark roller looks like it does a pretty good job too. Someone had some pics on a thread here and the stripes looked very nice. I think the roller is actually made by an aftermarket company though.
"Always do your best. What you plant now, you will harvest later."