I hope I'm posting this in the right thread.
I just bought a nikon d80 which is my first digital slr though I've owned a point and shoot and a 35mm or two.
The d80 will only take sd cards. I've read some stuff about them but the articles are usually more technical and I get a headache before I can find the answers to my questions.

Does card size make a difference in write speed, e.g.; does a 1gb card write faster than a 512 mb card?

How concerned should I be about whether it is a high speed card, say 150x, or one that doesn't specify high speed. Most of my shooting is nature, people, etc. and not sports though you never know.

I know lexar and sandisk are supposed to be good cards....are there others?

I will be grateful for any info received.

frog