After the positive responses to 4.1a, and the great news on the pen drives, I have taken the plunge, as I have said previously, the Yammies are too compressed re the drums and Bass, great for home/studio, not so much for live, not to mention I think T4 wont offer any differences here as well, along with the fact that it, the Audya has dropped in price to a level that's made it more affordable, along with free upgrades, it was time!!!! and after playing it pm last night, I'm excited!!!! the sounds even without the pen drive upgrades are magnificent. So come on Pen Drives, and this one to replace all others for quite some time I hope, no bugs here as yet