Sorry for the delay; I had spinal surgery 2 weeks ago and was in the hospital.
The Sony PCM M-10 that I’ve had for the past 3 years has every feature you would want for taping concerts, unless you want to do more complicated things like record in 5.1 surround sound or or record multi-track -like for an album!
I am not aware of any updated manufacturing for the Sony PCM M-10…
I would spring for a brand new one from Amazon because if you have a problem with it, you will be delighted with Amazon’s customer service and return policy.I would not buy an M-10 from some one selling their old one. The peace of mind from purchasing from a company like Amazon is worth the 75 bucks. No, lol, I don’t work for Amazon!
There are many variables that swirl about in the making a great audience recording. If you are going to drop some serious cash, drop it on your microphones. Anice pair of Schoeps or Neumanns will set you back anywhere from $850 > $2000 per microphone. To power those microphone you would need 48 volt phantom power and to avoid using the pre-amps built in to the recorder, you would need to drop a solid $1000 > $2500 for an external mic pre-amp. You would also need to buy a battery system to power the mics and the pre-amp.
These prices aren’t written in stone or anything, but expect to pay these prices for a higher-end system.
With that stated, what is your budget?