I don't have any direct experience with the items in question but past experiences with kits in other pursuits has me leaning toward a motor from the same company as the kit. It seems that whenever I try to match up assemblies from different manufacturers it never goes smoothly. Modifications and additional parts always seem to be needed and reliability was sometimes in question. A motor and kit from the same company should be much more compatible together.
I would also look at the potential of locally finding parts for the power head. If something breaks and replacement parts can be found close by, one could be back in service in only a couple hours depending on what broke and how handy you are.
