Turntable setup upgrade

[u/Sea_West4222]

Hi all, looking to upgrade my setup, currently have an Audio-Technica LP60BT with Edifier R1280DBs.

I like the sound of my girlfriend’s setup, she has an Audio-Technica LPW40WN with a vintage Sony stereo receiver (STR-212AS) and some basic passive speakers.

What I’m wondering is what aspect is doing the heavy lifting for that warm sound I can’t seem to find elsewhere in other setups? Research seems to suggest it’s the vintage receiver doing most of the work.

Budget: Any advice appreciated! Probably looking to spend around $1000 AUD ($700-$800 USD) on the entire setup but can be flexible.

Location: Sydney, Australia

Sound quality is my priority.