For me, a better question is... "If you could sell one gun you have, which one would it be?" I'm already playing musical gun safe space right now as it is, and I'm not allowed to buy anymore safes. If I had to run out right now and get another, it would probably be a Merkel. I have enough bullet hoses.
BTW, MG42's suck unless you slow that rate of fire down. I've been able to get them to a very manageable 750-800 RPM, but reliablility starts to factor in. I also broke 2000 RPM with a custom titanium/carbon fiber bolt, but it was real touchy on ammo and links. MG34's are a sweeter gun IMHO