Anyhow as you want petrol with performance and economy, I would suggest a Honda, that way keep the revs low, you have the economy, wack the revs high and you've got waaaa hooo.
So either maybe an integra DC5 or the earlier one as not many DC5's in that price range i don't think:
Example: http://www.pistonheads.com/sales/2654822.htm
Or maybe a Civic Type R
Example: http://www.pistonheads.com/sales/2721740.htm
Except for the fact that on the motorway at 80mph these things are around 4krpm and so will return nothing near the 42mpg he currently gets.

