DNxHD is a safe bet when it comes to editing DSLR footage like yours. Encoding into wmv would probably be a sideways step at best for editing purposes.
To encode in DNxHD, you need to download the codec from Avid’s site (I assume you haven’t already). You can then use MPEG Streamclip or Adobe Media Encoder to encode them into mov files. If file size is not an issue, make sure you encode them into the “175” setting. I find this setting is closest to ProRes 422.