Peter, some answers digi001 has 18 in/outs (8 analog, 8 through adat-lightpipe, 2 spdif) and integrated midi in/out. Mbox has a max of 2 in/out 2) no, ptle wont go any higher then 48Khz/24 bit. Also....ptle wont work together with other hardware. Only digidesign stuff is recognized.... 3) cant really help you there....i only use protools