Sony Portable Mini-Disc Player/Recorder (MZ-R500PCNAVY)
Good, but here's what's lacking
I bought an MZ-R500 a couple of years ago solely to record live music.  What a surprise that this model doesn't have a mic input jack!  It only has a line input, and I was unable to record anything live. (Later I learned that I'd either need an accessory battery box or an upgrade to record with a microphone).  I quickly upgraded to an MZ-R700 which has the neccessary mic input jack and have been more or less happy.  Also lacking with this model is the inability to start recording from anything other that AUTO volume level.  To change levels out of AUTO, you always have to start recording, press pause, and then go into the menu to manually adjust the volume.  Quite a pain when you want to record live stuff on the fly.  OH well. . .