agree here. But from what I read, the amp section in the FUN is better than the amp section in the HDP. That's why it's a hard choice to me.
X2 for sure regarding the HDP and HD 650 combo, which I am totally loving. I'm going to a local meet with weekend and look forward to testing out my HDP with more analytical phones like K702 and W5000. I'll report back impressions next week, but have a feeling my combo has great synergy that will be lost to some degree with those cans.
Also, I've been able to audition audio-gd c2c amp, which is a step up from FUN. I think the C2C is a solid amp and a nice value for the money. I wouldn't shy away from ordering audio-gd gear as it seems well built and well respected, but my impression from all that I have read and from owning HDP is that its DAC is likely significantly better than FUN. The audio-gd dac-19 however seems to get rave reviews and looks like a solid option for a dedicated DAC.