Hello guys and gals! At the moment I'm doing some "research" on the 3 300s' prime. 1. The 300 F4 2. The 300 F2.8 3. The 300 F2.8 VR I'v been using the 70-200 VR for my main lens when it comes to outdoor, sports and action shooting. Almost all of the time I shoot on my monopod. And at all of the time I'm at the very end of the lens i.e. 200mm. And the 200mm is surely not enough for me right now (just an excuse to get a new lens) So I'v been thinking of getting a TC and the contenders are the 1.4 and 1.7. Then again after looking of what primes can do, it kind of makes me think again. Honestly only the 1st and 2nd lens is within my reach right now. The VR is way out! So can any give me some infos and such on how all these 3 lenses perform. I mean like in term of focusing speed when compared with the 70-200 VR, how fast can you lock on your subject in action and sports shooting, is the 300 VR performance is better than the 300 2.8, is the VR really worth the extra money etc etc. The main reason I asked is just I wanted to make sure on which is which when I really do make my move soon since you guys here got lots of experience working on all of the 3 lenses mentioned. Thanks guys.