Cube Audio Nenuphar Single Driver Speaker (10 inch) TQWT Enclosure

You are welcome.  I believe that you'll be exceptionally pleased  long term with the Allnic-Nenuphar pairing.
Charles 

@yorkshireman In addition to Charles' excellent advice, some things to consider:

- I believe Srajan used Allnic amplification components with the Nenuphars. Might be worth revisiting those sections of his reviews specific to the Nenuphars AND specific to Allnic, to get a better feel for the pairings and synergy. Those reviews are from 2+ years ago.

- If you are still considering a new integrated I'd keep an eye out for those that allow for negative feedback control.

- I've been revisiting Peter Breuninger's Nenuphar Mini review for evaluating laptop based headphone listening purposes and the sound quality of that setup stands out. I believe the component used was the 'Tektron Stratosphere TK2A3 300BPSE i Ref' which allows for use of multiple output tube types. This would allow you to go with 300Bs as well as lower power tubes. I believe Tektron is fairly priced and may be within your budget.

All the best in your search and let us know how it all comes together with your Allnic T1500 or another amplification route.

6 Moon’s Srajan Ebaen did review the 30K flagship Allnic L 10000 DHT line stage that utilizes the 300b and lacks an output transformer thus an OTL component. The Allnic 1500 integrated amplifier uses the 300b in a traditional power amplifier output stage fashion with output transformers . Although different types of audio components, I agree with David. The review provides useful information/insight concerning Allnic’s design, technical and engineering competency. They are a high quality manufacturer of audio products. 
Charles

Srajan once told me he was very fond of the Allnic cables. Seems like a company with a good product line up. 

@yorkshireman As you'll no doubt see, prices can be all over the place for various SET designs. Charles rightly points out that the circuits are simple, so if you can, look for "under the hood" pictures that show you parts and power supply quality of the build.  If you're not confident evaluating, then post links here and I'm sure many will opine.

If you can at all swing it, I would recommend mono-blocks (or a single chassis dual-mono design).  I built my own amplifiers (from pre-made Nelson Pass boards), and the change in sound quality when going from a standard stereo build to a mono-block design with independent power supplies was quite substantial.  There is good reason why all cost-no-object designs have independent power supplies, as the two channels create distortion when they are simultaneously pulling on the same transformer.