Sorry to hear about your accident, that really blows. But on the bright side, your doc has pointed you to some really great machines.
Warning: a fast bent is like learning to ride all over again. That said, once you get used to one, they're
very fast.On some you could do your 20-22 mph paceline speed
solo, easily. They are also very comfortable- think contour recliner with headrest..
for example:
M5 Recumbents » Models » Carbon High Racer
I have the steel version, which is not as light and average over 23 mph for 40k TT's- and I'm not in the best of shape. By next year I should be pulling over 25 for 40k. I'd be Cat 5 on a road bike.