well, ill imagine for a second that i HAVE to choose one.
on that though, ill choose the Koenigsegg for a few key reasons.
it may be bland styling... but, at least i wont be grotesquely userped to vomit every time i see it parked out side. i think the keonigsegg is the honda accord of the supercar world... it would just blend in with the other supercars.
the doors on the koenigsegg kick ass
the engine is a wild and untaimed beast in the k-segg, whereas, i would not be suprized to find out the zonda has ESP built into the engine manegment computer. the merc v12 doesnt have a wild howl, it doesnt have an operatic voice.... in any clip ive ever heard it... its a mindless drone
and finally, if i was to buy one of these supercars, why would i care so much about daily drivability... if i can afford one, i cirtainly other car options that are designed for compfort, rather then a compromise.