Update: couldn't afford the 1590 as planned, ended up with the 1587 instead (got a good deal on it since it's an old design). Kept the dewalt for the duration of the "free trial" period just to compare the two.
I'm probably not telling anyone anything new, but there is a huge difference between the dewalt and the bosch. These are the problems with the dewalt:
1. Will not cut straight. The blade clamp looks to have come out of the black and decker parts bin... the same clamp is used on cheap 30 dollar jigsaws. If you get careless for a second and apply too much force, the blade shifts inside the clamp and gets jammed that way, causing the jigsaw to pull to one side. There is also considerable play in the reciprocating bar that actually drives the blade.
2. No blower fan for dust. The cut line gets covered up in no time.
3. Metal base has a tendency to scratch.
4. Bad casting. Maybe I am being picky, but the dewalt logo on the front was miscast, and housing generally did not line up as well as the bosch.
The one thing I liked about the dewalt was that you could adjust the angle graduations for the base (like most of their tools). The bosch has a positive stop at 90 degrees that appears to be a hair off.. about 1 degree off from 90 would be my guess
The bosch isn't exactly flawless either.. i'm sure the 1590 is better. The blade change is frustrating and it would be nice if the base adjustment was keyless. But i rarely use a jigsaw, so i think i can live with it so long as it cuts straighter than the dewalt