Hmm... 6'5"? Not sure, but I'd say so. I'm 6'1" and there's plenty of rail left in front of the footplate on the Red7. I'd say the Red7 has as much leg room as the Fenn Mako Elite.
The only ski i know presents problems to very tall paddlers is the V12: Matt Bouman for example can't fit in the V12.
The Red7 is an excellent downwind boat. I'd say it works pretty well in most sea conditions; it works particularly well on small runs - as evidence my paddling buddy gives me a harder time in smaller runs. (But that could also be the difference in our experience - I have more time than him in bigger conditions).
What do I like about the Red7 in downwind conditions? It seldom nose-dives and if it does it seems to pop up again very quickly without slowing dramatically - like some other skis. It also goes diagonally across the waves very nicely.
I do find it a little less maneuverable than the Mako Elite (which, read another way, means that it holds its line more firmly.) I have a custom elliptical rudder (similar to but smaller than the Epic surf rudder) which makes my Mako Elite a little more twitchy perhaps, but makes it even less prone to broaching, and more maneuverable. (By maneuverable, I'm talking about the ability to change direction, especially when you're coming off a wave, to go chase the next dip.)
I paddled the V12 in Mauritius (big ocean swell) and liked it, but liked it somewhat less in wind generated waves in Cape Town, when I found that it would stick its nose into the next wave and slow down.
So my personal preference in downwind conditions would be Mako Elite, Red7 then V12. (I spend most of my time on the Mako Elite.) But they're all great boats.
(Bear in mind that I'm a middle-aged mid-packer, who does better in downwind conditions than on the flat! There are paddlers who swear by each of these skis...)
Rob
Currently Epic V10 Elite, Epic V10 Double.
Previously: Swordfish S, Evo II, Carbonology Zest, Fenn Swordfish, Epic V10, Fenn Elite, Red7 Surf70 Pro, Epic V10 Sport, Genius Blu, Kayak Centre Zeplin, Fenn Mako6, Custom Kayaks ICON, Brian's Kayaks Molokai, Brian's Kayaks Wedge and several others...