> From reading about DPA mics, it seems that the 4060's are better for louder blues shows, rock shows than the 4061's.
Both will handle high sound pressure levels, but the 4061s put out a lower level signal, so they are less likely to overload the mic pre-amps in your recorder than the 4060s. For recording loud music, we strongly recommend the 4061s.
These days, with these mics and with most recorders, you don't need an external pre-amp. Modern recorders' internal mic preamps match the self-noise spec of the DPAs well, and you won't gain anything by using an external pre.
Our High End Binaural mic set (HEBs - using the 4060x-series mics) are very tightly matched for binaural use. We match them tighter than DPA's matched pairs. And our HEB battery box is quite a bit more rugged than DPA's own now-discontinued battery box.
Read more about the HEBs here:
http://www.core-sound.com/bk/1.phpWe see lots of second-hand mics bought on eBay come through our shop. Some are okay but many of them are really beat. And it's rare that we get a pair that match, even if you stretch the meaning of "matched".