From a certain price point upwards, there's no real justification on further quality merits.
I also agree with Dipesh. Following seven intense years of acquisitions, three brands stand out for me: H.L. Thater, Shavemac, Simpsons.
Out of these three, I guess at the moment Shavemac appears to have an edge on quality & performance vs. price.
A Simpsons brush may have an initial high acquisition cost, however once you get to use it and as soon as it reaches the break-in point, you shave and thank yourself for having made sacrifices to acquire it.
The role and contribution of a genuinely good shaving brush can never be underestimated in wet shaving.