Look into the BAT VK-300x with 6922 option. Not sure of current pricing but I would think you could buy new for your price or $3000 used if you can find one. I've had one for almost 4 years and it still satisfies. My room is only half the size of yours but it has enough power to be pleasant throughout the house. 150 watts into 8 ohm and double that into 4 ohm. Balanced design with two balanceded inputs with 3 more rca. Rolling tubes is relatively inexpensive with only two 6922 tubes and it is very responsive to tubes and cable changes.
Problem is once you get one of these it's difficult to upgrade because nothing comes close to it without going separates or spending a lot more. No affiliation just happy customer.
Problem is once you get one of these it's difficult to upgrade because nothing comes close to it without going separates or spending a lot more. No affiliation just happy customer.