Another house, another shower remodel...

In my last remodel, I used a Kohler thermostatic valve and separate volume controls for the heads. Worked great, but I wasn't impressed with the Kohler thermostatic valve. I found the response time too slow. Sure, it prevented scalding, but you definitely felt the temperature swing before it corrected. The Moen PB valve it replaced never had any response delay.

I'm looking at the Delta thermostatic valves for this shower. Do they respond faster than the Kohlers? Or will the TS valves always react slower than PB valves?

And while we are talking Delta valves, for the faucets, should we go for "diamond seal" valves or avoid them?

Thanks gang...

Jeff