A gen 1 Helix 12 would be a great bow unit for 360 viewing and probably the best bang for the buck... if you can find one used somewhere. 360 only uses the 455 frequency so a mega unit will not give you any better image than a gen 1 will, as far as the 360 image goes. A 10 inch screen would work fine too.... and some use smaller than that... but the Helix 12 is awesome with 360.