The XPCR is a fairly old unit and it used to be sold by Leviton also before they came out with the HA series. It's kind of an old design but it worked very well and was reliable.
I think the CR230 is the best one for the money, and the CR234 is the best unit period. Just want to let you know prices of both the CR230 and CR234 will be droping quite a bit at the end of the month. ACT is getting real agressive with their pricing.
Bill
www.homeautomationnet.com