Low-Powered Tube Amp for Zu Soul MkII?


I'm totally new to tube gear, but I just got a new pair of Zu Soul Mark II speakers, and I think my old solid state integrated might need to be replaced with a tube amp. I've been reading that these high-efficiency speakers really like lower-powered tube amps, and I'm wondering if anyone here has experience with them. Here are my constraints:

I have a small room.
I'd love to get something that's made in the 'ol USA.
Preferably around or below $2K.
It would be ideal if it could fit inside our existing cabinet, which is 17.5" deep (this rules out the Cronus and maybe even the Sphinx, unless I make some huger changes).

I love the look of the Rogue Cronus and maybe the Sphinx even more, and these prices are conceivable. But one of my conditions is that I need to be able to hide all this stuff, and my cabinet's too small depth-wise for some of these bigger amps, sadly.

Thanks for any suggestions!
dungan
Hi Dungan, There is a very recent thread on the Sophia Baby. A few owners here have even upgraded them and report excellent results. You may find that you end up keeping it longer than first anticipated. Great Amp!!! Enjoy!
No one ever regets a Sophia Baby, if its enough power there is no need to ever upgrade.
Schubert, I have never heard a Sophia Baby, but all owners report I've read were always glowing. Certainly there is no need. The particular thread I mentioned explains their experiences. It may be of interest to you.