Yes totally agree but I can't afford to buy all the systems at once IF I were to buy a pair of the RCF HDM45a's/HD10a's/702AS subs, FBT Promaxx110a/Subline 112SA, EV ELX200 10p/ELX200 12sp and Yamaha DXR15mk2 systems it would cost over £9000!
Pairs? You don't need a pair to audition and compare performance! If you can affort a pair of subs and tops, then at the very least you can get a sub & top from each range and compare. And then, if you're determined to try all three, send back the loser and get the final set.
And this way, you're assessing how the kit compares for your material with your use cases and your tests. That's surely going to be more satisfying than any forum recommendations will ever be.
Of course, the other option is to hire. But that's actually probably much more hassle.