Ok so im car shopping and im really interested in the 2001 mercedes cl 500/600 and 2003 bmw m3. I cant decide between the cl 500 or 600. Is it worth the extra 4 cylinders for the 600? I want a fast sports car but the v12 may not be that good in gas mileage. On the other hand, the bmw m3 is really good looking and from what i've heard, it packs a punch also in performance. So can anyone help me decide which would be the best bet? the v8 or v12 or inline 6. Please and thank you.