I'm 6'6" with a 35" inseam. I've tried the Cannondale caffeine in an XL and it just wasn't big enough. I know cannondale makes some models in a "jumbo" size which would be greater than 23" I believe, but not in what I'm looking for.

I thought that the top tube might be a better measurement too, but the Specialized models I'm looking at are even bigger at 25.98" and 26.38" (horizontal). I have fairly long arms and torso, so I need a long top tube with decent reach as well. I realize manufacturers don't design bikes with guys like me in mind.