Yeah, the DC-3's are becoming rare.
It's a very nice sounding amp, but I don't like the huge amount of mids and the lack of bass has. It could be the unbranded speaker it has, which looks cheaply made. Though I can get it to sound the way I want with the EQ. I'll have to hook it up to a different speaker to see what happens.
I just got it recently, so I haven't had much time to try different tubes and stuff.
This is probably my second favorite boogie. I have a mark IIB, a subway rocket, and the DC-3. I used to have a DC-5, but I traded it for the IIB.
Overall, I love how it sounds, but I always use the EQ for the lead channel.