I have a pair of KM 184's that I have been very happy with. All most all my effort has been recording my wife playing the piano or organ at home and at churches. I use a MAC based computer system at home.
Now, I would like to record at churches where I would not have a 110 volt power supply. So, I am looking to purchase something like the ZoomH4n or Sound Devices 702. It is my understanding that either of these will record and provide phantom power to the mikes from internal batteries. I would guess based on price the Sound Devices must be better sound quality. It also gets good reviews. But, the H4n is smaller, lighter and 4 track. Also, I notice that Neumann makes a Phantom Power Box. How does that work - does that just provide phantom power? Would I still need a recorder after that?
I would appreciate any input that might help me make the right decisions about putting together a high quality, small, battery powered recording setup using my current 184's.
Has anybody directly compared the H4n and 702? Or, is there another recorder I should consider?

Thank you very much.