Congrats on the NAD. I had a Duende 30W 6L6 head. You are right, the cleans are extraordinary. I did not care for the dirty channel at all and sold it. When you kicked in the extra gain stage it got really saturated but was very loose. I like my gain tighter in the low end and more compressed. I ended up selling it. It worked great with my band playing rock and roll covers. I probably should have kept it but I kept trying to do higher gain stuff which it really isn't meant to do and ended up getting rid of it. Great amp for cleans, blues and classic rock stuff though. I really had to fight it to play any kind of lead, probably a testament to my poor technique.