Hi, I'm thinking of using the PX-560M as my "backup band" for an acoustic duo, as well as in my home studio. I'm torn between this new unit and a PX-5S. Synth programming is quite low on my priorities, but authentic "acoustic instrument" sounds is a primary concern. I've got some questions for you: 1. Onboard Tones: I've looked everywhere I can think of and have been unable to find a list of onboard tones. My concern is, with diminished "synth" capacity, will the PX-560M include enough electric piano, strings, brass and/or orchestral tones. Will there be a full complement of, for lack of a better word, ethnic instruments like mandolin, banjo, bouzouki, guitar, steel guitar, etc.? 2. Purpose of the System Track on the sequencer: I'm trying to understand the purpose of a 17th track that lacks volume control. Please explain. What other controls are missing? 3. Sequencer track mixer app: One of the videos shows how the onboard screen is used to mix the sequencer tracks. It looks quite small and difficult to use. A mixer app for using a tablet to mix tracks might be useful. Any such plans? 4. Arpeggiator: How limiting is only having one arpeggiator? From what I can discern, I can store a single arpeggio and trigger it with a single key, or I can switch to arpeggiating between the keys I've pressed. I can select between a couple different arpeggiator functions. Correct? Can I store one arpeggio and switch to "keys played" mode without erasing my stored arpeggio? Can you give more details? 5. Countoffs: It might be helpful to have a countoff part stored in the rhythm tracks. Maybe a male voice saying, "One....two....one, two, three, four....." Just to make it easier for everybody to at least start together. I've always wondered why no manufacturer has ever considered this. If I've got a vote, I say a male voice with a British accent. ;-) 6. Internal speakers: Defeatable? 7. Auxillary Audio Ins: Can both the 1/4" and 1/8" audio inputs be used simultaneously? How are the levels balanced? Using only the level controls on each auxillary audio source? I realize its stil early in the process and things may change, but I need as much detail as you can provide. Then I'll ask for even more. ;-) Thanks, BC in CA