If I could only keep two of my mics, those would be the ones. You can do very nice work with those, a stereo pre, and a stereo converter/ DAW. For drums, the 421 is my go to mic on the kick. I've used the TLM 103 as a mono overhead before, it works nicely, though usually I use it out in front of the kit 3-6 feet, even with the drummer's head. For bass guitar, I use the 421 on cabinets and the Neumann is nice on acoustic. On guitar, again the 421 is a standard on cabinets and the Neumann is one of my faves on acoustics, as well as a second room mic for electrics. I like both for different vocals. HTH