Don't know about kmx, but I do have a short wheel base Vision VR40 with over seat steering. Recumbents in some ways can differ so much, it really is the case of doing your research and finding out what you want out of one. In a nutshell:
Pros
-fun. Fun. Fun. Street luge. Did I mention it's fun? Go round a corner on one!
-easy on the back -you can do miles on one
-unique, and that translates in my experience to being more noticed in traffic than a df. I think most people who criticize recumbents for being low down and not being seen simply haven't ridden one.
-something different (it can be tempting to grow a beard and wear sandals)
-fast downhills and on flats, you have a lower aerodynamic profile.
-no or little weight on your hands and stress on your back
-closer to the road, less distance to fall
Cons
-poor value compared to dfs. In terms of being mass produced and enjoying lower unit costs, recumbents aren't. You won't find a similarly specced recumbent and df at the same price.
-usually heavier because of the previous point
-if you want to transport your bike, think again. Transporting a recumbent because of their length or size can make this more of a challenge.
-you can suffer from a sore bum and back on a df, and you can potentially get numb toes or "hot feet".
-certain recumbent designs are more unstable (think short wheelbase). Not a problem if you have a trike or a longer wheelbase.
-parts such as seats can be expensive or hard to find.
-can be tough for balance in trafficky areas (again depends on the design) where you are constantly stopping and starting.
-can't stand on the pedals. You use a slightly different set of muscles and reel yourself up hills -traditionally you will be slower on a recumbent going up a hill. Of course that only really matters if you are racing!
I'm sure I've missed some points -but that's what I came up straight away. Really, I'd say test ride whenever and whereever possible. The problem is that with so few around, it's very hard to, and even if you can try one for a few days, it's so different from a df, you may not appreciate all the good or bad points. And as Steve pointed out, not everyone is suited to them as well. Good luck!