Wireless problems

I have a Linksys Wireless B router that played great with my old XP desktop and my XP laptop. It does not play well, at all, with my Mac Mini and that XP laptop. I don't know why, I just don't think Linksys supports OSX well or at all. I know the Linksys setup CD is filled with drivers for Windows only.

So I'm thinking of just buying Airport Express because that IS XP/Mac compatible and supports 802.11b too.

Is this a good idea?