canon a540, sd300, and casio 7000050 with opt view

[fishycomics]

TIA

Research is a key.

1 I watched a video that was 30 minutes long with the sd 300 model, do not know the res that theperson filmed due to google, and liked what I saw. Understanding it's an older model minus features on the newer ones.

Canon a540 Like What I saw again one guy does a 1 minute reviewe and sounded excellent video looked excellent, but whenI watched a youtube this person got me down, His Camera has motor noise big time, even watched his a630 review but the 15 min of video was a total turn off. Understanding avi is a bigger file system over asf.

Casio the model that has the opt view finder is it the 750 or 850? need to find a vid see how long a 1 gig card or 2 gig card is?

what i am placing up are my feelings or asking someones opinion

I hear canon accepts 1 gig and will allow 2 gig, I hear casio will turn on while not careful

so many people with information that differ scares me. again thank you for all your help ahead of time

1. I need a new dig camera to replace my Olympus 4aa 2 meg loved the batt life

2 aa preferrred over lithium, but will sacarafice if needed

3 do not need highest meg, but preferre a higher optical zoom.

4Video 640x480 low light and night time all situations basicaly

5 rec while zoom.

6 sd card preferred.

canon casio which model would be better for me? I preferre avi over quicktime but again will settle

whle the sales are here i may pick something up. soon