I have personal experience with sth 14 drivers and tyrolia peak 18s (same construction as deadbolt 15s and 18s, just different color/spring) and they are both rock solid, very reliable, and very durable. I haven't used jesters, but I've heard mixed reviews. Some people swear by them while others say they break and have too many plastic parts. I don't know anyone personally who has broken jesters and have never used them personally, so I'll let you make your own decision there. The 110 jester brake will not be too big for the blend. I wouldn't want to go too much bigger, but at 5mm of overhang on either edge, you'll be fine until you're carving so hard you're dragging your shoulder in the snow, which I doubt you'll be doing on blends anyway. I would say go with whatever you can get for the cheapest. All three will be relatively durable, relatively light, low stack height, freestyle oriented bindings with a relatively neutral ramp angle and a pretty high degree of adjustability (the sth especially with it's adjustable toe height and wings). Sure there are more durable binders out there (think fks 155/180 or sth 16 steel), and lighter binders out there (dynafit comes to mind), but for your purposes, all three of those would work beautifully. Order the cheaper ones and enjoy the ride!
p.s. Keep in mind that the angle and sharpness of the jester is perfectly suited for anal penetration in the case of a backseat landing if you're into that kind of thing ;)