I wouldn't buy a 28-70 on cropped sensor. 28mm is not nearly wide enough, it's almost a normal lens. Tamron makes a 16-55 f2.8, but 55 isn't that long, especially when you can get a fast 50mm for cheap and 2.8 isn't that fast either, barely faster than the common f3.5 at the wide end of most zooms.
I've heard the Rokie gives superb bokeh. It's manual focus, which some can live with, some can't. Some think 85mm is an odd focal length on crop sensors. Kingofthehill uses an 85mm I think, it seems to work for him
As usual, try before you buy.