CamOne already has a POV cam with interchangeable lenses:
Review: CamOne Infinity POV Camera | RoadRUNNER Motorcycle Touring & Travel Magazine
Regarding the Q, the 03 Fish Eye is useful for rigged selfies:
But I've found it (and other POV cams with ultra-wide lenses) to be almost too wide - the epic scenery gets pushed too far away. When riding with others, I tell them that they have to be right on my tail in order to be more than a spec:
The 01 Prime, on the other hand, is great for subjects but the FOV is a bit long for epic scenery shots:
It can work though:
I've been hoping that Pentax releases a moderate wide for the Q as a compromise. In the meantime, I bought a Nikon 1 V1 with a 10mm F2.8 (28mm EQ) used, and the FL and lighting AF is very nice:
I haven't tried the newest GoPros yet, but I have used a fair many, and the Q trumps them all for IQ:
The only IQ issue I have is jello:
Engine vibration combined with the CMOS sensor is the culprit here I think. I never had an issue with the Ricoh GX100 with CCD sensor, but video was shite on that.
Overall, the Q is already a really good POV cam for my uses. I just need a 28mm EQ and I'll be happy