Okay, after sending back my NW HD3 I have now ordered a Karma. It seems to meet all my requirements except a) it's fugly and b) lots of reports of HDD failure. I can live with the first and, on the second, I've made sure that I've bought it from a reputable place that will replace within 12 months if it fails. In my experience the duff ones tend to fail in the first few months so if it lasts then I should be alright. Arriving next week so I'll post up my thoughts when it gets here.