Dang, glad you're alright. And you don't know what happened? I think not knowing how or why I crashed would put me off riding more than the actual crash itself. In the back of your mind you'll just be waiting for it to happen again, and have a sense that there'll be nothing you can do about it.
"Probably cold and at the legal limit BTO14s on a coldish night
and an unlucky breeze."
I've heard some cracking excuses before, but that's gold right there
Most people usually conjure a face saving excuse using the standard diesel spill response, so top marks for invention
Why would you want a SS600 to replace it? Get something that you won't have to completely strangle down to 33bhp, and perhaps that will be cheaper to insure/repair? CB500 or ER5, SV650 or ER6. Not a peaky 600 which is going to feel like you've ripped its guts completely out.