Lovely kit, like the Hope HID's, nice mounting very neat lighting systems.
Couple of P7's (1 on bars and 1 on helmet) out class them light output wise, buy a couple of spare batteries and you match the Hope runtime.
Horse for courses, if you want a good light that well put together, & have the money spare, go for a Hope. If you want cheap/value for money P7 everytime (or a troutie/smudge offering).
Decent backup? I ride with ppl who have any number of HID/Main Manufacturer LED's/P7's, can't prove it to you though…