Is there a good DIY headphone amp out there?

Or is it more worthwhile just to buy one premade? I'd like to embark on my first DIY experience, and this seems to be the appropriate scale. Any suggestions? I'd use it with an Arcam CD23 and Sennheiser HD600's. Thanks.
There are a couple available (most notably the meta42 & the kevin gilmore dynamic). Check out for details. Enjoy !

HighwayStar on Head-Fi
I should add that I'm looking for an actual kit, not a design that I need to execute. I'm a DIY newbie, but want to get my feet wet. Thanks.
Here is the link:
I built class A mosfet version amp and it is fine sounding unit. Have fun.
Meier Audio has a great kit, the Corda HA-1. Check it out ->