Sandy,
If possible you should check out the mid-west recumbent rally which I believe is coming up in August in WI. There will be a lot of them for you to try.
Something I did was to look at my physical problems verses seat positions. I have neck (nerve) problems and the closer my chin is to my chest the more discomfort I get in my neck either at the time or later on. We have upright bents, where I can hold my head up and like them a lot. They are Sun EZ-sports.
Also think about where your weight will be on your back. I didn't want a C-shaped seat with the weight on my tailbone. Your weight position will also change as your feet go up in the air higher (away from the ground).
Warning: When you first get on one it will feel "odd" and it takes a few rides to get used to them. It is not like changing DF's. It is a much bigger difference.
Go for it!