My EVO is my daily driver, and if you live anywhere where the roads are maintained a "reasonable" amount you will love it. If you live in Detroit (I used to live there, trust me on this) do NOT get the EVO as a daily driver, get the WRX STi... the softer suspension on the STi will keep you from wanting to kill someone
Fuel milage varies with maturity level. I get between 20 and 22 mpg commuting back and forth to work (not much stop and go, but some) and 26 to 28 mpg highway cruising at 75 to 85 mph.
Now the fact that the company wants you to have a four door enough to be willing to buy you one.... does that mean you need an image car to impress clients or take them to meetings and such? If yes, then don't get a sport compact type of 4 door. Even though in reality it is a great performance value it doesn't project the correct image for business use.
Perhaps if you were willing to switch to a low wing and buy some JDM EVO VII tail lights (red instead of alteza style) it would still work out. I did this myself for the sleeper effect.