On my way out the door - cycling. But not before I chime in with 4 GB memory assigned to Amarra. Their rule of thumb is to use 50% of what you've got on the computer.
But for the record, none of the amounts of memory assigned prevents Amarra from losing its mind. My Mac mini music server is naked as a Jay bird! Outside of music programs, ain't a whole lot there in software with most services turned off.

Granted, there has been some improvement but it still acts up. And none of my other OS X players, Windows or Linux players ever stumbles. Instead of patchwork repair, an overhaul seems to be in order. It's likely something at the very core of the program from the very beginning of their design that's keeping this audio player from delivering a world class performance. Not that is doesn't sound great but the experience is lessened.
One more thing, I will say that under Mountain Lion, Amarra is quicker, more responsive to track changes in either Playlist mode of iTunes/Amarra mode. Still get hit with delays though, but not always. BTW, I use Cache mode when possible.
Edited by Silent One - 7/25/12 at 5:57pm