Tinhead,I also like the Sport Tour screen better. Checked both out before buying and decided that the DB wasn't really much of an improvement on stock. Sure, you could see the instruments a little better than with the stocker, but there was no way to get any significant portion of your body beind it.
Although still tiny, the ST does give you better protection without noticeable windblast.
I think the DB fits the "Racer Rick" image a lot of guys are looking for, but I don't think it fits the lines of the bike as well. In addition, the ST counteracts the stock "*** -high" look, better.