First headphones and amp combo?


Need to start using some headphones with my system for late night listening.

My 1st generation Rogue Cronus Magnum does not have a great headphone module(I understand it's really good now). Am I correct that I can go fixed out to a headphone amp?

I am considering the Zen Can Signature and the Schiit Asgard 3. Thoughts there?

As for as headphones it looks like the Sennheiser HD 6xx is a great value and mates well with the Zen Can 6xx.

Any feedback is appreciated.


bajaed
I have about a dozen sets of headphones including some "high end" ones including Audeze LCD-4, Sennheiser HD800, and Sony MDR-Z1R. 

The Sennheiser HD6XX get more use than any of my other headphones.  They are not the "best" sounding, but they are very easy to listen to and are super comfortable (I often wear them to bed).  I think they're hard to beat at their price point.  

I have no experience with the headphone amp you mentioned, but the amp does make a big difference.  The HD6XX will respond well if given good amplification.  I use the Sony TA-ZH1ES.
This really needs to start with what sound characteristics you’re looking for.  The 6xx aren’t a good value if they don’t give you the right sound for your specific tastes. 
Sennheiser headphones are great. I have had many pair over the decades. One comment is that the source and amplification are critical in having great sound. Typically I will have a ratio of 3x or more in electronics to headphone cost. You have to start somewhere. So what you propose may be a good start.  I started with headphones and a iPod during my most recent venture into headphones to get where I am now. (Click on my user ID to see my current setup).