memory card speeds

[Simonnn]

I think im pretty decided on getting a canon 400d now, one thing I'd like to know is what to do about storage. It takes compact flash and I'd like to get a 2gb card, prices for these seem to range from £25 upto £100. Apparently the 400d can do a burst of 27 JPEG or 10 RAW images at three frames per second. Is the type of card I get going to effect this, I know cards have speeds but what would I require to stop the card effecting this. Would I experience problems with the cheaper memory?

Thanks

Simon

 

[Simonnn]

Oh right, thanks for clearing that up