4060 is both quieter and more sensitive than standard sensitivity B3 and is an excellent mic for acoustic instruments. Relative value is a subjective thing and hard to quantify, but to me they are well worth the cost premium over the B3s for recording real acoustic sources in good sounding rooms. They just sound better, others feel differently and that's fine, as sound quality is ultimatley a personal subjective impressison, but noise & sensitivity differences are measured specifications.
'At a distance' problems are unlikely to be corrected by using a different pickup pattern, expecially non-PA amplified accoustic music. Generally omnis will sound more natrural, but directional patterns can be used to somewhat compensate for bad room accoustics or unwanted noise behind the recording location. The way to correct distance issues is to move closer. A PA system can change that dynamic to some extent, but it still generally holds true.