For $1k used there are not a lot of choices, unless you look at some of the Chinese brands, which tend to have pretty poor resale value.
The only 2 brands I'd consider at your budget is the Rogue Audio Cronus Magnum, or the Primaluna Prologue one or two.
Both are well built, reliable and sound good.
As far as tubes go, it really depends on the power you need - 300b and EL34's sound the best, but are low powered - usually under 30wpc. KT88's are also popular at that price point - they are less tubey sounding, but offer more power.
As long as you use a moderately efficient speaker with an 8 ohm nominal impedance, you should be fine with 20-25wpc in a room your size (unless you like to rattle the walls). Subjectively, a 20wpc tube amp will have about the same power as a 50-60wpc solid state amp.
The only 2 brands I'd consider at your budget is the Rogue Audio Cronus Magnum, or the Primaluna Prologue one or two.
Both are well built, reliable and sound good.
As far as tubes go, it really depends on the power you need - 300b and EL34's sound the best, but are low powered - usually under 30wpc. KT88's are also popular at that price point - they are less tubey sounding, but offer more power.
As long as you use a moderately efficient speaker with an 8 ohm nominal impedance, you should be fine with 20-25wpc in a room your size (unless you like to rattle the walls). Subjectively, a 20wpc tube amp will have about the same power as a 50-60wpc solid state amp.