Depends what you want your daily runner for I guess. I wouldn't call those mpg figures "good". I get more like 60-67mpg out of the Golf (depending on the type of driving) but obviously not the same performace figures.
I like my daily runner being comfy and fully loaded with toys and the fact it is slower than the Exige makes driving the Exige at the weekend feel all that more "special". I guess it depends if you can handle just plodding about during the week or want that sports feel all the time.
I'm with you there. I drive a C Class merc day to day, when I get in the Exige it feels even more special, you appreciate what its so good at. Goes the other way, after I've been in the Exige I'll get in the Merc and really appreciate the comfy seats, the lazy auto box, the softer suspension, kicking back with cruise control listening to music
I appreciate bit, comfy luxurious cars as well as sporty, track focused drivers cars. So having one at each of the scale suits me down to the ground. I did try to do the sensible thing once, buy a car to do all jobs, save money. So bought a Z4M Coupe. Problem was it wasn't as comfortable and luxurious as the 535d, and wasn't as fun to drive as the Elise. Jack of all trades, master of none So this time I want to go even more exteme and get a really big, comfortable luxury barge this time
One thing I do miss from the 535d is that odd time you want power, overtaking? Putting some boy racer in his place So that's where the XF is ideal. I don't do loads of miles a year, 10-15k? So the different in fuel economy from 40-50 doesn't equate to much really. (difference between a 2.2 and 3.0 XF)