Was going to use the M5 as an everyday car but there is 4 seen flaws:

1--Its fucking insane and i can see a ban if used everyday
2--MPG (averging 13mpg)
3--Its getting a DMS tune to 550bhp
4--A tubi exhaust so people will hear me from miles away

Now dont get me wrong, fuel consumption is not a real concern but its just not possible to drive sensibly

So what car for circa 10k - 15k thats fast, fun, reliable, and fairly economical like averging atleast 18mpg would be good

911?
M3?
Boxster?
Evo?


Sorry its another look at me post but some offer valuable advice