I say stick to the FRS... they'll give you the best range... build a box to connect what you want... and invest in some head sets from one of the companies that has the noise canceling in them like baer... and you'd be set. and all would cost under $200 I'd think. but would take a bit of time and effort.
The cool thing is you could dismantle one of the FRS Units... and hard wire it into your bike.. put the display up where you need to see it... but hide the antenna and what ever else behind some fairings in a sealed box... then put the transmit button on the left grip.
as for the box... I think you'd want one connection for FRS, one for Music, one for GPS (actually quite nice but not needed), and possibly one for your phone. then one out that only sends out the FRS traffic... to go to the camera.
I'll keep looking... 5 days of sitting on my ass after my PRK surgery on the 22nd... but till then... not much time to look.