Different makes of pump ie. Grundfos,CP,DAB,Wilo,Clarke, etc, all have similar performance but wildly different prices. Do you get what you pay for or are the cheaper pumps as good when it comes to reliability, efficiency,noise (or lack of), or any other point of view ? Just asking out of curiosity as I've just replaced a couple of old pumps,like for like ,with new. One was my own, both Grundfos. Any useful comments appreciated , thanks.