I was in the exact same position about 2 months ago. With summer coming up, and lots of trips planned up to the forest in Haliburton, I wanted something that I could throw on the camera to give me some reach without breaking the budget, or settling for lower quality.
I ended up getting the 70-300VRII f/3.5-5.6 and I would have to say that I am not dissapointed at all in the quality of that lens. I will have to post some samples. For a lightweight 300mm range lens, it performs really well. And sharpness is definately there! It's no 300mm f/2.8 VR, but then again, its also not $5K.
I think you should definately consider it over the 80-400 which I was also looking into. The 80-400 is a nice range, but without AFS ... I just couldn't see myself going down that road.