GM won't confirm, but it appears the entire first year of production is sold out already. GM hasn't mentioned how many they're producing in 2020, but a reasonable guess would be 35-40,000.
I think the 2020 Corvette looks a lot like a new Acura NSX. The NSX has a base price of $159K though, which puts it in competition with the Audi R8 and the Porsche 911 Turbo. For $60K the Corvette is an amazing accomplishment. And I agree with James, I've owned quite a few sports cars, and I've never cared what the audio system was. In a Corvette it's really irrelevant unless you're parked, since the engine and the exhaust system makes enough noise music seems more like a distraction than anything else.