I'm in a similar situation. I've just ordered the HD650 and I'm now looking at DACs and amps. A friend recommended the Little Dot Mk V but, unfortunately, he's already sold it so I can't get a listen. Google brings up a positive review on it posted here but it's from 2008, so I was just wondering what the most recent recommendations were considering I'd rather have a separate DAC and amp rather than an all-in-one job.
Almost forgot: Budget is about £200-£300 for each. Also, no thread hijacking intended as it's basically the same topic! Just thought it'd save making a new thread.