stax new 2020, 3010, 3030 or used 3030 ?

[avl2]

Hi,

after using for several years dynamic phones (Sennheiser, AKG, Beyer) I consider buying a STAX system.

This starts of course with listening at a dealer, which comes very soon.

Due to budget limitation I consider buying a 2020 basic system or 3010 or 3030 classic system (SR-303+SRM-313).

I listen to a broad variety of music inkluding classical orchestra, piano, violin, more popular female (like Kate Bush), more popular male (like Peter Gabriel) and also to more "heavy" music (like Deep Purple, Judas Priest).

Questions: would you go for a newer cheaper new (2020, 3010) or for a used 3030 classic system ?
which advantages/disadvantages do you see for used / new ?
how much cheaper a used 3030 can be than a new one ?

thanks, regards