The high density foam ones? {The tempers} I got very uncomfortable trying them out... I felt like I was constantly SINKING and it was disorienting.
Once out of them I still felt like I was moving!
Tho I know of others w/severe muscular neuropathies that loved them.
As for the sleep# beds? IF you web up radisson hotels+sleep# beds, you could try one out there for a nite? Seems to me that that try-out even at a $$ & nice hotel mite be a cheaper way to find out if you like them, without any commitment.
Face it, the foam toppers help for the interim and while I don't use jersey fabric sheets? I use flannel ones I got on sale and they are great.
One thing about those 'free' trials? You've gotta find a place to keep your old mattress IF this new one doesn't work out. AND then if you don't like the new one? The costs of returning it can 'get' you a bit. And...always make SURE that the mattress comes in 'factory wrapping' [tho I've no clue how to tell?] and factory box. That way you know it wasn't returned from a 'trial' before.
BTW, ever notice how consumer reporting never really EVER says one mattress is better than another? It's kind of like our neuropathies I think....no two are ever alike.
Truly wishing you a comfy nites sleep and soon!
- j