I have both rigs. The 4061's gather dust. 99% of the time, it is the mk4 > NBox that gets the call.
Don't get me wrong, the 4061's are beautiful sounding mikes, but and in a close location, like FOH or stage lip, they are perfect with a quiet crowd.
All your NBox issues can be easily dealt with. Big and Heavy: I wear it in a shoulder holster, PM me and I'll give you the link for this rascal which is about $20. Battery Life I use rechargeables. PM me for what I think is the best brand. Self Wearing Issues PM me for pictures to my rig, which is awfully close to Josephines, although we did not collaberate, we just sat their looking at eachother and said, "Wow, you do yours like I do." Fixed Gain Who cares? I'll control gain on the recorder, usually awfully low, and boost it post. Stepped gain is just one more knob to break or get tweeked while in a pocket. The fewer adjustments I have to make in the field the better, as prying Security Guards and idiots next to me who like to talk at loud volume, "Wow, that doesn't look like a cell phone! Are you recording? Wow. Hey Marge, look this guy is recording the concert!"Wires Nicky or a Cable guy can make some nice custom cables (actives and TRS) so there are no loose, or long, errant wires. No Lights The NBox has no lights. Other than a tight switch, which can not accidently flipped, once on, it stays on. I would get the outboard connections as XLRs instead of RCA's though.