I think a windows laptop running on battery using foobar via dave asio driver is the best bet. this way the asynchronous method ensures bit perfect transfer with out any data loss as mentioned by Rob watts earlier. there is a continious check of any data loss and if any packet is faulty it is sent again. the clock of dave is used to pull the data from the source . a further improvement will be to use s good usb cable which resist rfi and emi . right now furutech gt2 usb cable is imho the best which can beat much more expensive usb cables. additionally one or two ferrite choke one each end may further benefit without much extra cost. this is apart from good power cables for dave. I don't have dave right now but imho you don't need much more than that for dave to shine to its true potential. even if someone uses other expensive accessories for dave the improvement may be very minor and may only be tangential in nature.