My girlfriend and I did some car shopping today for her.
In addition to checking out the S60 T5 and T6 AWD sedans last weekend, we test drove-
2012/13 Lexus IS250 AWD - Bland styling, great quality, not as fun as other vehicles, including the S60, the 250 isn't particularly powerful. Small interior.
2014 Lexus IS250 AWD - A lot of improvements over the last generation, much more fun to drive. Much more expensive though.
2013 Acura TL AWD - Ugly, boring, not greatly impressed. Drove OK, but just Ok. Good quality but not as good as the Lexus. Too big for her liking. TSX does no offer AWD. TLX is probably too new to afford.
You should take a look at the 2015 C300. The MSRP is expensive, but MB give massive discounts to anyone. I'm in Canada, but in the US, they give $9-10,000 off MSRP.
I was looking at the IS250 but went with C300 instead because of the discount they give.