If anyone from Akai is watching this, they are probably laughing !!! There's nothing wrong with dreaming, but ........ Come on guys !!! Rule number one (to bring back an old cliche): "If it don't make dollars, it don't make sense". If anything is going to become of an "Upgrade", it's only going to be as a direct result of hard-core business wrangling. I know we've all dreamed of that great update, but....... Akai would rather make a whole new machine, like an MPC 6000, with all of the features we've been crazy about in the MPC 4000 along with all of the features we've complained that needed fixing or emending over the past few years. They MIGHT make a new machine, if the count was right, but an upgrade to the 4000 is truly D.O.A. unless someone takes over at Akai and has a nostalgic and sympathetic heart toward all of us 'poor, poor' 4000 owners ! Seriously though, we'd be better off petitioning them for a hotter version of the 4000 and even still, they'd have to really believe that there is a significant market share that will 'latch on'. Openlabs with their DBeat and quite a few other companies out there doing the 'MPC thing', it's only a matter of time before someone creates the software version of Akai's hardware sequencers or comes so close that the MPC Brand goes the way of Kurzweil - Reub