Well I'm not a woman, but I'm into biology/psychology and have read about the topic a number of times before, so I think I can give you a fairly quick answer to this. Also as guy I certainly spend a whole lot of time pondering what any given lass would be most into.
If a woman is looking for something short term, she's probably going to find a guy's body to be somewhat more important. If she's looking for something a bit longer term, chances are she's going to find facial features play a greater role. The exact same thing goes for males, although facial features are generally more valuable to females overall. Not only does research support that, but it also makes perfect sense biologically. If a guy's in really good shape, it means he's immediately a good bet, so if a girl is just looking to hit it and quit it, if you will, chances are the guy will immediately be a good provider for both her and her child (remember, we're talking biologically here. As such sex is for reproductive purposes). On the other hand, facial features are very strong indicators of genetic quality. That means that if a girl is looking for a longer term partner, she's going to want a guy who can withstand the test of time and will remain healthy for the longest. Therefore, she'd be looking for a fellow with nice facial features.
Now, the reason women would be a bit more interested in facial features in general would be because the only sure thing that a guy will contribute is his 50% of the genes for their offspring (that would be a little different the other way around because women also have to carry the child, meaning their overall health will contribute to how well the child develops). If they're in a group the group may be able to provide, or if her sexual partner were to die or something all that would matter would be how good the genes he passed on to their child was.
So in summation, I imagine that facial features will tend to win out for women a lot of the time. Obviously I'm sure they prefer the whole package, particularly broad shoulders, strong hands/forearms, and a muscular chest, but that can't compete with a scruffy square jawline, a strong brow, and a nice smile. Actually, nice full lips and big, soulful eyes belong in there too (of course I have it all, so ya know), as it has been shown that females tend to prefer a mixture of masculine/feminine features in guys' faces, which I guess makes sense; the girlies like looking into fellows' eyes and do so a lot when they talk, and obviously they like smooching, which surely they'd prefer doing with someone who has nice lips...man, chicks are just so painfully endearing, they're even cute in what they prefer in the opposite gender. I just want to hug them all.