First choice is the GE Monogram Professional 36", 6-burner cooktop. Says it will go from a 140 degree simmer to 18,000 BTUs on all six burners, plus the iron grates all reverse to make a wok stand.
For roughly the same price I could get the Thermador 6-burner cooktop. 15,000 BTU high, but they were demonstrating the 375-BTU simmer by melting chocolate chips - on a paper plate - without burning the plate!

Both of these have the option to get a center griddle ISO the center 2 burners, but at higher cost.
Anyway, I could go cheaper, or much more expensive, but these are my contenders. And I still like the GE best.