And this is why I love this place. You guys are awesome.
@Neuro;
Hrm,apparentlyI didn't look hard enough as I was told that you could slap a 1.4x TC on the 75-300. But regardless, that would just make image quality horrendous. You bring up a valid option to cropping photos to get 'more zoom' as opposed to getting a longer focal length lens. I never really even thought about it, and would certainly make things a bit easier.
I suppose I may attempt to try a 1.4x on the 70-200 f/4 that I have now to see if the extra 80mm gives me that much more, or if I'd be better off just cropping what I've got and saving myself a couple hundred bucks.
Let me ask another question then; would upgrading to the f/2.8 be worth it? I know that it would allow twice as much light in, and I believe it also helps for faster focus times. Please do correct me if I'm mistaken. Again, typically I'm doing outdoor shots where there's much more than enough lighting. But on the same coin it would be nice to have just to be versatile if I ever did want to do any indoor shooting. But at the same time, could I not add a flash and still get relatively similar results? Ultimately it's something I'll have to decide on myself, as you guys obviously can't know exactly where I plan to be, what I plan to shoot, etc to give me a definite answer. I just like knowing everything there is to possibly know about things. ;P