If you live in Singapore, you could visit Robert Lai from SG Live Acoustics https://sgliveacoustics.com/.
He sells Line Magnetic wich is an excellent brand of tube amps and cheaper than your budget in some models. Maybe he can show you how good class A tube amps sound like
I have a Line Magnetic LM 508 with upgraded tubes and it’s a musical monster.
I agree with someone up here in the thread, good tube amps with good tubes give a sound I can’t find in solid state, even at very high prices.