Webwork - 1:25 pm on Oct 15, 2013 (gmt 0)
Unless you plan to advertise in media where the hyphen could present a problem (like radio) I wouldn't change a thing. Search engine love is very finicky. Why risk a working relationship? Stick with the 301 unless or until the original site/domain is beaten down.
Might benefit by reading this: [webmasterworld.com ]
Also, use WebmasterWorld's search tool to research the topic you have raised. The subject has been discussed many times over the years.