Memory cards

[zetec]

I will be buying my new camera in the next week or so (hopefully) It will be a Nikon coolpix 5700. It comes with a 32mb card which I think is a bit puny. My problem is with the camera set at the fine setting the compression ratio is 4:1. According to Jessops catalogue that means I can store 48 pictures on a £30(128mb) memory card.

What do I do??

Buy 3 or 4 128mb memeory cards or 1 512mb card??

Also the battery life is quoted as being 90mins. Does this seem short to any of you??

[zetec]

So will a 512mb card preform faster and better than a 128mb card??? The reason I ask is that I read somewhere that memory cards are not infallible so I would rather lose a £30 card than a £120 one.