Well, since this thread has been resurrected (I thought it would be tacky to do it myself) I can tell you that I ended up with a CS Gim. I was pretty surprised at that, but after spending almost half a day holding everything in the store (I found a store that had LOTS of swords!) that seemed at all likely, it felt the best and lightest of anything I could afford.
My design criteria was to be able to cut and thrust and and be as short as possible. Added to that was sturdiness, light weight and balance- at least as well as I could tell.
I am perfectly happy with this as a first sword- it is very sharp, seems decently built and balanced, and while obviously not the best, it far exceeds what I would've thought reasonable to expect for anywhere near the price.
More important than the sword per se is what it has taught me already. Please don't think I didn't believe the many warnings I got here- I did- but I still wanted the experience. Holding 30 inches of double-edged very sharp steel gives you(me) a very eery and instant respect for what a sword is. I think my hair actually stood up a little when I got it home and in hand. It is one thing to know how dangerous a sword can be, another to actually experience it. All thought of taking it in the backyard and swinging it around left my head. I can see how important controlling the angle and direction of the cut is, and how little of that control I currently have (stick "play swords" don't really teach you about hitting with the edge).
I went back to the store the next weekend and got a wooden practice sword just to build up some strength and control, and am already to the point where I can do some of the exercises with the sheathed sword. I am having a blast and looking for a couple of books to get me started.
As far as the original premise of this thread, I can see that my concern about length was even more valid than I had thought and for more than one reason. My next sword will be the Dahong Palay from here-
http://www.typhoon-gear.com/products.htm I am sure it will be a much better "sword for the untrained". Meanwhile, I will see about getting some training "just because".
Please don't get me wrong- I have handguns and long guns if it ever came down to a real need to defend myself. That doesn't stop me from wanting to develop other abilities. Swords (and nearly all weapons) have always appealed to me, and I'm finding it a very fun way to get in better shape.
Thanks for all the helpful posts, and watch your edges! (sounds like skiing!)