Actually, having had some first hand experience in using higher quality speakers and lesser or greater quality amps, I'll pitch in with my pennyworth!
The 752s are, or were, a £500 design in the mid-90s. I think we'd be looking at around £800-£1000 to better them now. I run them mainly with a budget Sansui AU-217. It does the job fine. the speakers sound great, full of detail and so on. No real issues. Put on a better amp and the difference is like night and day; more grip, better dynamic range, more control over the drivers, etc, etc, etc.
Spend £1000 on a pair of speakers and £300 on an amp by all means, but don't expect that to be the last word in what your speakers can do. My take is it's a fallacy to believe that one item holds greater sway than the others in the chain.
I've changed all three components in the last couple of years, the greatest impact has probably been the step up to a higher quality amp, but a better CDP gave me more detail and the speakers delivered a wider soundstage.
It's getting the marriage of components right and the resulting sound that comes out, not the decision at the outset to allocate the available budget in preset portions to a greater or lesser degree to one particular element in said chain. Be prepared to change your views and don't hold on to "holy grails"!