CR's two top-rated 36" gas cooktops ($10/month digital) are the Samsung NA36N7755TS and LG Studio LSCG367ST. Complaints about the LG are about its plastic knobs but LG may have fixed that because the spec sheet states specifically that it has metal knobs. (My LG induction range has metal knobs.) Three tested KitchenAid models were not recommended. No Bosch were tested.

Thank you for letting me know.

I went with the Bosch 500 (NGM5658UC) model. I was waffling between the 800 and the 500 until I read the specs closely and found out that the 500 and 800 had equivalent BTU output when powered by propane, which we have. Power has been more than enough for my cooking so far. All parts have been very easy to clean. Knobs are black metal. I am very happy with it. (And saved me almost $500 by going with the lower end model.)

The "dual-ring" center burner of the Bosch NGM8658UC differs from that of the NGM5658UC. Is it worth $450? Dunno.