Holy cow! I didn't realize the laser levels had come down so much. Yeah, I'll be getting on of those for sure!
I've used the T&G CDX before. It is pretty nice stuff! I think I may go that direction.
It's very possible that the slope was planned for wash-down reasons, since it was intended to be a flower shop. It made for some strange and unfortunate modifications to the house (that I'm slowly, but surely, UN-doing). There is actually an end door in the construction that will be going away before we do this floor project. There's also a flat roof (er... very low sloped roof) on the addition. But THAT is a WHOOOOOOLE 'nother story! HAHA! There will be a post on that eventually as well.
Last night I was telling my wife about the education I've been getting from this thread and I mentioned the heated sub-floor... Yeah. I guess we'll be doing that as well.... HAHA! So if any of you can refer me to a good thread on heated sub-floor products that would work for this application, it would be much appreciated.