300b vs. NOS mullard el34- both amps in push pull


I have Quicksilver mid monos that are el-34 based. I am wondering if I should buy some expensive NOS Mullard EL34's(unarguably the best midrange for a el34) to get the so called midrange magic or just go to a 300b push pull design.

I want to stick with push pull for the dynamics and power and realize by not going SET that much of the midrange magic is lost on the 300b (a third option might be one of the hot-roded 300b set designs like the Wytech or Border Patrol but many have written that these two do lack somewhat in the midrange that a typical 300b SET provides or maybe parallel 300b's which also supposedly lose the magic).
frankk
Get some of the new KT77's. They are as good as the old Mullards if not better.
I thought they were in my Eastern Electric M520...better than XF1 with the big base.
Some of your answer will depend on your speaker load and your room. If you could answer that, along with how loud you listen and musical choices, we could make a more informed recommendation.
100db efficiency in a large room that is usually playing very loud complex music. I will eventually also try out a lower powered amp but for now 20 - 50 watt amps is what I'm going with.

I'm just wondering if the Mullard (xf2 not xf1 due to cost) has the beautiful midrange of a 300b in push pull if hypothetically both amps were the same. If not maybe I'll start considering buying a 300b p/p rather than buying those expensive Mullards for my el34 amp (I have come to the realization that I love a great midrange and will sacrifice other areas if I have to).