Haipo, I second the vote for Audio Note kits, and I'd bet this would sound fantastic with Unos:
http://www.audionotekits.com/PM_Integrated.html
Resale is good and it's a hoot to put together. There are also many well-documented upgrade paths with this amp so that you can experiment and push the envelope--all the way to a full silver signal path with silver output transformers! Building and listening to this amp, you might find a new aspect of this hobby to enjoy.
Doug
http://www.audionotekits.com/PM_Integrated.html
Resale is good and it's a hoot to put together. There are also many well-documented upgrade paths with this amp so that you can experiment and push the envelope--all the way to a full silver signal path with silver output transformers! Building and listening to this amp, you might find a new aspect of this hobby to enjoy.
Doug