I am looking for a fabulous peanut sauce to dress a salad with.

Soy, PB, peanut or another light oil, rice wine vinegar or lime juice, minced garlic, red pepper flakes, scallions, honey, and (optional) finely chopped peanuts. I'm also not a good measurer for things like this, but I might go 2:1 oil to soy, and then go from there, using enough acid to create a nice balance.

I'm not a good measurer. But peanut butter, squeeze of lemon, carrot juice and grated ginger.
Yum!

The salad I had in mind is a brown rice and veggie salad.

What kind of salad? I make a (warm) peanut dressing with peanut butter (warmed), coconut milk (or water) to thin, some lime juice and zest for zip, a touch of ginger and garlic, and red chilli flakes and brown sugar if I feel it needs some smoothing out and balance. And definitely served with lots of cilantro.