Why do my 255/50 R19V get so noisy?

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2005 X5 4.4i/Sport Package 66K miles. front tires are 255/50 R19

OEM Diamaris got noisy the last half of their life.
Replacement Nexen (Korean) -same experience.

I'm about to replace the front Nexens again due to wear (30K) and they are quite noisy..

Can anyone recommend a tire that will not get obnoxiously noisy with wear?
Before buying this car, I tested an X5 with 19 inch Toyos-incredibly noisy.

My other car is a Lexus GX470 (AWD SUV) with Michelin LTX M/S 2's. No noise at 60K on the tires

thanks, Jim