You are mixing up terms. If you are referring to noise floor and bit depth, then you are talking more in the area of dynamic range. Power is voltage and current, and Q701 isn't that demanding a headphone that E17 don't have enough on both. The tricky part about Q701 is often not about having not enough power to drive it well, but often not having the right synergy / performance to drive it to its best.
Aye, I am - Although you seem to understand what I was aiming for - I'll lurk around a bit more to find the proper equipment ;)
Bowei - Norway is not part of EU, thus making it very hard to receive shipping from international sites (we can't buy electronic equipment from amazon for instance!) I'll check if audio gd' actually does ship to Norway