I have a pair of La Sportiva Rajas. They're my first pair of trail runners and I bought them because:
-They had great ratings on every site I checked out.
-They're designed for rain/mud/snow
-A positive review spoke about using them in mud and snow
-They were on a huge sale at mountaingear.com for $50.
I've put about 90 miles on them at this point and love them. They are EXTREMELY comfortable and so much more fun to hike in than my old boots.
I dunked a foot on my most recent trip, when it was about 35-40 degrees and rainy, but within a few minutes that (soaked) foot was comfortable again. I hiked four more miles that day without a problem. By the time I stopped, I couldn't see much of a difference in how damp my feet were, and I was still comfortable.
I should note that part of the heel recently separated from the sole. This was probably 8 or so miles ago. I superglued it back together and it's been fine. I considered going to La Sportiva about this and still may if it separates again, but I think the superglue did the trick.
As far as the durability of this shoe goes, that heel separation may have been my fault. I did the same thing on the same foot with my old pair of Montrail boots that had a Vibram sole. So who knows? All I know is that I'll never hit the trail without a small tube of superglue again.
Anyway, that heel incident aside, these shoes do just fine in wet and cold conditions.