Anyone have any recommendations for spa covers. Good or bad experiences with specific models I should be aware of.

Great prices for a high quality cover;

Abracadabra Spa and Hot Tub Covers | Insulating, Rolling, Aluminum

I got one last year from Abracadabra/Robert's. It is very well made compared to the cover that came with the tub when I bought the house. Service/delivery was good.