Lexus IS 350 or BMW 335i/xi

[ledfoot]

I will soon be buying a new sport sedan. My initial choice was the Lexus IS 350 because I liked the 306 HP and 4.09 gear which makes the car go fast. I also really like the exterior style. However, I live in Minnesota and even though the past 5+ winters have been mild, I am cautious about buying a rear wheel drive car. The BMW 335i comes in All Wheel Drive (xi) in addition to Rear Wheel. I test drove a 335i yesterday and was impressed with its acceleration, particularly when shifting the automatic transmission. The IS 350 includes paddle shifters as does the 335i (xi does not).

So, can I get some opinions on IS 350 vs 335i(xi)? Also, should I get AWD which basically limits my choice to the BMW?