Getting started: what boards and Zigbee kits?

I want to get started with Ardiuno. Mainly, I want to communicate between a computer and an ardiuno with Zigbee. So, what do I need to buy? I figure I need an Ardiuno board of some sort, plus two zigbee units.

Does that mean I should get a XBee Explorer and an Ardiuno XBee? Do I need anything else, or should I be looking at other options?

(I don’t want to build a kit at this point- I’d rather have the hardware working so I can concentrate on other things)

Here is a good starting point for xbee