Wow 800 bucks in a little airplane. Sorry to hear about your loss. I dont know what I'd do if I lost my 2500 dollar Extra 260.

I'd probably get another. Hehe. What eflight said is so true though. If you want to ever either get over a crash or get over the fear of crashing, just look through a catalog, find something you really really like, and tell yourself, I can only buy it after I crash my current. :P
In regards to the spin theory, he said it went straight in so it doesn't sound like there was any rotation to the dive. Also, full up elevator would flatten out the spin, but usually RC airplanes are designed so stable that it would just pull out without any rudder input.
Quick question. Did you range check with the engine on before flying? Sometimes at certain RPM ranges there can be intermittent RX problems due to a bad crystal or other components that may be damaged. I always range check with the engine running every day I fly.