70’s rock pressings. Witch equipment deserve?

I have 3.000 LP, most of it 70’s prog rock. Some of them are “audiophile” pressings (Classic Records... etc). But just a few.

Is it worth it a expensive capsule/phonopreamp for that kind of recordings? 

I know that classical music, or jazz masterings were masterworks in their times, and deserves the best capsule/preamp you can buy.

But I dont’t know if Genesis, PF, King Crimson, Magma... 70’s pressings would get much better with a super capsule or it’s better to invest in other parts of the chain to achieve the best sound.