Mike,
Any experience with this one?
http://www.stewmac.com/shop/Electronics,_pickups/Pickups:_Guitar,_archtop/Kent_Armstrong_Suspended_Jazz_Humbucker.html
yes. no, i don't like those one bit. I may be wrong, but i think that is one of the overseas "licensed" pickups, not handmade in Vermont. Don't know for sure.
anyhow, i've had 2 or 3 of those on guitars i've owned and they are thin and overly bright. depends on the sound you want of course - they ARE at least as good as the Gibson Johnny Smith mini humbuckers that came on some of the older Gibbies and Heritage archtops, but well...
Also, the lack of adjustable poles is a turn off for me, YMMV, but I will say the best "smooth top" floating jazz pickup I've owned is the Bartolini 5J pickup, which is an excellent choice for that thinner, more acoustic sound.
By contrast, the Armstrong (VT-made) PAF 12-pole humbucker has a much fatter, more electric sound.
Here is the one I love: