Cheers for that Tim,
Good to hear you don't miss the zoom function too much - in an ideal world I'd definitely prefer to use a full frame camera, it may just come down to the pennies, and what housing I go for.
At the moment if I buy new I was considering a hugyfot (previously used Subal and loved them but will struggle to finance one at the moment) which I can put together for a 7d2, but if I go full frame thenit'll have to be either used or Ikelite.
thanks for your input though, all good to know
p.s. - hope you caught the match against the Hammers last night, we're finally attacking like we should be!