Denon 1712 - $310
EMP e55ti and e56ci - $1,250
HTD Level 3 Towers/Center - $1,000
Focal 814v & cc814v - $1,150
Arx a5 & a2 center - $1,000
Leaves roughly $500-700 for sub to reach your $2,000 budget. That's plenty of sub for that size room. Plenty of choices in that budget also.
Panny 65st60 / Denon X1000 / EMP e55ti / EMP e56ci / EMP e5bi / (2) e1010i