Originally Posted by PentHassyKon 
200/2.5 - I couldn't wait for one at the $ I had so I went and got the 55-300. At 200 it is @ f4.5, so roughly 1 1/3 stop off. With SR and use of a monopod (can I use SR with a monopod?) Might just be able to do it.
Another thought is possibly the Nikkor 180/2.8.
k300/4 - well compared to 55-300's f5.8 @ 300, another 1+ stops difference. I wish I could see how big it is compared to the 55-300.
I've got the Pentax-A 70-210 as well as the Vivitar Series 1 70-210 f3.5. I'll post the pics soon as I can put em up in flickr.
The 55-300 will have do for a while until I get another opportunity (reasonable one that is) for the 200/2.5 or sensor technology get's better. I figure by the time I can get the 200/2.5
I look forward to seeing your results. I use SR whenever I use my monopod with the longer lenses. It seems to work fine for me.
Tom G