i want to use a domain name incorporating either of the two. or should i stay away from using these names in the domain name?
Both are registered trademarks, but they would have trademark rights even if did not register them. I don't know if they are enforcing infringement on their marks at this time, however, they could at any time. To be completely safe, you would need express permission to use their marks in a domain name. Anytime you use the mark of a company/product in a domain name that is going to be related to theirs, it's going to be infringement - regardless of whether or not they have registered their trademark.
I remember MS starting enforcing their MSN trademark in the Netherlands a few years ago. Wasn't pretty.