I got an Orange Tiny Terror head three days ago, and have spent the entire weekend with it. It's the only amp I've ever played where the half power setting was just as good as full output. 15/7W. It's also the only single channel amp I've ever played that has great British tube clean tone all the way up to Iommi's modern Laney tone, all with 3 knobs ....Vol, Tone, Gain.
I'm going to have a blast with this little amp. It can get bone crushing loud too. Pure power tube breakup.
I still stand by my recommendation on the Tubemeister 18 head. And any of the Orange lunchbox amps.....the black ones if you want super highgain.
I think those are the best small tube amps that can give you clean to highgain.
Outside of that, stick with modeling amps for low volume home practice.