A couple of additional points.
The CMR cable housing is quite a bit longer than the housing on the Nbox cable or KC5. Not by too much, but when the capsules are attached and the MK4/CMR combo is placed next to the mk4/CK5 combo it is definitely noticeable and when trying to conceal microphones every millimeter counts. Also if you are using standard Kwon bars, the spacing will be off though the included angle is the same.
Next point would be that the CMR decreases the sensitivity of the capsule by about 50%. The mk41 has a sensitivity of 14mV/PA when paired with an Nbox but only 8mV/Pa with the CMR. So you need more gain from your recorder assuming you are going mk41>CMR>R09HR. If you are using a preamp, in front of the recorder, it may not be a big deal, but then you are adding more bulk and could just use a Nbox.
All this said, I think the mk4V>CMR>R09HR would be a great setup to be used in the standard fashion since the length of the capsule+CMR housing is going horizontal to the axis of the PA. Also, the lower sensitivty might not be a problem since it is louder up front. This combination with a simple single 9V battery is way smaller than Nbox or any other preamp. The MK4V capsule is much more expensive than the MK4 though and if you can't afford the MK4V and want a card, I would go MK4>Nbox since the CMR housing would stick out to much to stealth in the standard fashion.