So my first ever purchases were:
Sennheiser HD 650
Bottlehead Crack with Speedball upgrade
Epiphany O2DAC/Amp combo
Since the headphones arrived earliest, I plugged me straight into my macbook pro and fired up my lossless tracks. I must say im not very overwhelmed and understandably so. The senns are a tight fit but i already knew that from the reviews. It felt like I was listening to the same music but a bit louder. Not much difference. Very low bass, not much difference in detail when compared to my skullcandy earbuds but I guess that is to be expected as Ive heard HD 650s are VERY different when amped and need to be paired with the right one at that to shine. Here's hoping i get my amps here soon!