Maybe I'm nuts for selling off my 70~200 f/2.8 VR. Nice as that lense was and yes I've bought and sold 2 copies over the last few years it's never given me satisfaction. Yes the images are sharp and contrasty but for me the lens lacks "reach". I know you can add TC's but that kills the speed and I'm not fond of converters. I found the lens to large to "walk around" and to short for when on my tripod. So I've decided that I "need" a 300 f/2.8. I lust for the latest Nikkor 300 f/2.8 VR but it's more than I'd like to spend at this time which brings up this question. Between these two Sigma's which is better? Any advantage with the prime lens as to sharpness? Contrast? I know the zoom is more versatile but I'm really looking for the best image quality. Do either of these rivial the Nikkor? I known I could do a search but I'm anxious to learn from those members their most recent experience. I'd be nice to have one of these "long" lenses for the upcomming holiday weekend.