Check out
www.smalldog.com for good prices on refurbished Macs. They're an Apple authorized reseller. Also check out Apple's website. Look for their refurbished section. They have some great deals too. I just bought my wifes iPod there for about $60 less than retail.
We switched from a PC to eMac several years back. I just updated the OSX to the latest version. We have had far less problems with the Mac than the PC, and I like how much more compact they package them in with the same power. On the other hand, I just purchased a Dell laptop for my wife to use for school because some of her study software won't run on the Mac. I much prefer the Macs though.