The Bosch 1587 and 1590 jig saws (and their barrel gripped equivalents) are the ones that get a lot of praise. I have a 1587 and dislike the blade change mechanism but it cuts so well it makes up for it.
The 1590, on the other hand, is praised for its blade change mechanism.
I have a 1590. It's a GREAT saw. Let me tell you something about paying extra for the better blade change mechanism. It is well worth it!
You don't think much about it, but after a few minutes of heavy cutting, it's nice to be able to slide the lever and have a smoking hot blade pop out. Touchless!
No need to grab a hot blade, and no need for any tools to change blades. It's a game changer.
As for which model to get. The 1590 is discontinued, but I hear that the replacement is improved (even more power, which is hard to believe). Personally, I really wanted the 1591 which is the barrel grip version (instead of the top handle). But I got the 1590 cheap at a pawn shop, so I can't complain.
BTW, something not mentioned here is the quality of blades. Bosch uses the same type blade as most modern saws. But the quality of the Bosch blades is well above anything else you can get in the hardware stores around here.
Oh, and something not exclusive to Bosch, but something I've noticed about many German tools. They're not stingy when it comes to the cord. With my Bosch and Fein tools, I find an outlet, I plug the tool in, I walk back to what I'm working on. Done. With most everything else, I'm left looking for an extension cord.