Need help with getting an electronic drum kit for husband (not a beginner)

I need help with buying my husband’s 40th birthday present. He’s a drummer who is not a beginner and is actually really good. We are having a baby in two weeks so can’t get an actual kit. I know NOTHING about drums, so I’m teaching out to the community to help me with what would be good? My budget is max AUD600. Please help a girl out who knows nothing about drums haha thank you!! I know $600 is quite cheap and so I’m not going to get the best, but I want something that isn’t like a Kmart brand for under $100!