Good CD Player for Headphone System?

What's a good CD player for a headphone system with Sennheiser 600s and a Corda Headamp? Do hi-end CD players really make a difference here? A small box would be nice. Thanks.
The NAD L40 is a CD and Integrated amp in one. 20 watts per channel and sounds amazing for the cost. I got a "new" B stock for $399. I use mine to drive the Energy speakers on my deck with amazing results for this price point.
Hope this helps.
High end players make all the difference here! Try the little Mission Cyrus CD player for small size and great sound.