Funny how you get different answers from different people. I'm 6'6" with a 38" inseam and one place I went said that only Cannondale makes bikes big enough, either that or I needed to go custom. Meanwhile, my normal LBS recommended a XL sized Ridley with sloping geometry. According to their site, it'll fit up to 39" inseams, and it's about a 60cm frame.
Seat adjusment, the right stem....get it dialed in and there may be several options out there for you. The old size/geometry calculators you see online seem to be based only on standard geometry bikes. Now, with compact, sloping, standard, and other options, the old calculations don't necessarily work.
Go to 3 or 4 shops and get some recommendations and let them sort out each others' BS.