I can say that I know about that addiction!

I rode my Specialized Hardrock until it basically fell apart. I could do almost everything with that bike that I can do with my new one. I rode it for probably 3 years until I just made the leap. And leap I did. I got a FS but there was a learning curve to it, definately with the shocks (read: over the handlebars). I think with your accident a FS would be easier on you, but to me, I would just go for broke and buy the bike of your dreams if you know you are going to stick with it. But try them out too. I rode a couple of different bikes, and found the Ellsworth but never test drove it. Which is pure luck on my part that I liked it. But it rides like a dream, and the guys at Wrench Science really know how to fit a bike.

Good luck! Best addiction I ever picked up!