While I would not call them audiophile classics, they are much improved from the original releases. Who Do We Think We Are! also sounds very good, but I hear less improvement on the Fireball and In Rock remasters (In Rock is only available on import for some reason). Note that I think all were de-noised if that is going to bother you. Bonus material and packaging/notes on all these releases makes them worthwhile if you are a fan.
There was a DCC Gold version of Made In Japan that is supposed to be very good, but I have not heard it.
There was a DCC Gold version of Made In Japan that is supposed to be very good, but I have not heard it.