Condor this might be worth some consideration, there have been two of these special + 8's on the market this last year ( Uncle Melvyn and Allon Whites had one also ) and I'm sure this could be readily adaptable for legroom and of course they come with the taller screen as well.
Good luck with whatever you chose, the MGA is a fine looking car and far more unique than the B's.
Just don't go leaving TM...