Any question answered...

I still use mine in a doorway. I'm stable on them, after hours and hours and hours, but they're staying in a doorway. Forever.

Some people advocate single leg exercises on the turbo for working on form, but I don't subscribe to that at all. My turbo has seen a lot of use though, and will continue to do so.

@jayloo - riding a lowish fixed gear for a few months (over the winter or whatever) should help your form, particularly if you don't shy away from the odd downhill, or riding on the flat with other riders who are geared or running a taller gear than you. 60 to 63" works well, and you can comfortably average winter training pace :)

I ride with fast dudes, so ride a lot harder and faster than other people I know, but have been slowing down when I'm by myself to try to concentrate on how I move my feet through the pedal stroke and trying to use my legs instead of my lower back when going up inclines (Cedars is not a hill, but Latchmere Road is). I'd like to get in some more aerobic exercise, so how are turbos not good for that? while watching the telly b/c I hate the gym but want a similar kind of exercise.

I'm on 46 x 19.

Neil, I will take that turbo of yours to try it out, thanks!

Other than that, does the one I linked to seem like a good price/place to start?
Here it is again, for reference:
http://www.evanscycles.com/products/tacx/cycle-force-1-excel-turbo-trainer-ec025172