<< IMHO, I wouldn't buy ANY Sony under $500 because they are crap and you are paying much more for the name, rather than features. Anything over $500 is fine (S75, S85 or F707). >>
I agree. I bought a Sony P series a while back for someone, and wasn't terribly impressed by the quality of the build. These Canon's though are built like a tank (well, almost). The sony is mostly plastic. Image quality also leaves something to be desired IMHO.
<< Using memory stick is a drawback as well, I don't like many proprietary things. >>
That's what I used to think. But think again. Memory stick will soon (if not already) overtake SM as the number 2 memory media choice. Hence, more volume = cheaper prices. Besides, I don't think the prices for memory sticks are that outrageous at the moment. And I don't think they are proprietary anymore. The licenced out manufacturing a while back. I know that at least Lexar and Sandisk manufacture them now.
<< Regarding the speed of the CF card, the faster, the better, of course. However, it also depends on the camera you are using. You will see a much bigger difference in access speed between Nikon 995 compared to Kodak DC3200 with the same CF card.
Last, but not least, there are no current hot deals on high-speed Lexar, Kingston or Viking cards that I know of. Glad that I got my 256MB Kingston CF for $70 AR a while ago >>
I'm wondering about access speed. What exactly do they affect? Every camera has a built in ram buffer anyway, and I thought it was a two stage memory transfer - from ram to CF. So, in reality, it should affect normal operation unless you are shooting continuous mode agressively, in which case, it wouldn't matter how fast your cf is - you'll still see a noticeable delay.
I think the things it will really affect are image playback and transferring files to your pc.