Zaurus owners?

I'm a long time Palm owner and have been looking in to replacing my Zire 72s. I have been thinking about getting a Zaurus. I have found the SL-5500 / SL-5600 online for various prices, is it worth saving up a little more for the 5600 or will I be fine with a 5500 and a larger CD/SD card?

[crossposted]