Same here. I'm somewhat interested, but because they don't seem to come on till 6k i'm waiting to see some reviews. If it turns out that it just turns into a monster above 6k i might do it, but it will have to be a complete transformation up there because not giving any benefits below that is very disappointing. Seems what they di was to find a profile that re-creates the 790 speedy's top end while retaining the 865's low end. probably all that can be done, but at $1k it may not be enough.
A 904 would only be 39cc for me. I'm not sure if that plus the extra bit of compression would make much difference, but the cams would be zero work as opposed to the BB. No way i'd do that. But since i have to do the valve adjust soon i just figured throwing the cams in would be no extra work and therefore eliminate one of the 2 evils of engine mods........money/labor. But it's not so much that i'm looking to beef up the low end. Yes, i'd like to but i'm ok with it. My point was that $1k is a lot of cash when all you get for it is the last 1.5k RPM's of your bike's range. If they were $300 i'd already have them.