Good posts. @wavendon has gotten numerous worthy suggestions on this thread. I don’t have a good feel or sense as to how committed he may be to getting maximum sound quality his budget would allow. Earlier atmasphere mentioned the Leben 300 integrated tube push pull amplifier which uses the el 84 output tubes.
A bit over the stated budget but an excellent recommendation. I had previously recommended the Luxman SQ N150 which is also another high quality el 84 push pull Japanese tube integrated amplifier. Similar to the Leben but a little less expensive. Either would allow the Omegas to sing at a very high level.
I mentioned the Coincident Dynamo MK III which is a bit different. SEP class A with a triode wired el 34 with zero NFB circuit. Priced under 2,000.00. All three amplifiers are from highly regarded manufacturers and will employ very high quality parts, output transformers and power supplies. This is what the higher cost gets you. I’d shoot for the quality proposition.
If the OP really wants to go for it with his very fine Omegas then these higher caliber tube integrated amplifiers are the way to get there. All of the body, presence instrumental tone (Acoustic dominant jazz instruments) dynamics and transparency one could want at or near his stated budget. That 15’x10’ room would transform into a really nice jazz venue like environment. It would sound gorgeous.
Charles