I certainly agree with your premise of the SI making an excellent compromise between sensible family hauler and grin factory for a driving enthusiast. I can't really think of another car (at that price) that does both as well.
Precisely.
Anyhoo, time for a fuel economy update. After 1,250 miles, I'm averaging 21 mpg US (11.2 L/100km) in city driving, and 32 mpg US (7.35 L/100km) in highway driving. These numbers are with driving on the more enthusiastic side of average; I'm not racing other cars from stoplights, but I'm
definitely not hypermiling either.
From what I've heard, these numbers will improve slightly after a couple of oil changes and the engine being fully broken in. So I'm pretty happy with how it's performing at the pump.