This is the griddle assembly.

the burner is #258.

I would also look at the metal making up the griddle and the material making up the cooking surface. Wolf is rolled steel So it can be seasoned. The Monogram is stainless over aluminum similar to a clad pan. Thermador is aluminum with a nonstick surface. Not sure how long that would last.

I use an add on with my range. It has almost 50% more cooking space over the two burners. You can use aluminum for heat conductivity but nonstick or bare(seasoned). You can also get steel if you want to. You will have a lot more heat if you need it. You also can have zoned heat.

Some people prefer the thermostatically controlled griddle because to can turn it to 350°F and it will be the same each time. You have to adjust the heat with an add on like you would a pan.

I have picked up the whole griddle and put it in the oven.

http://royalindustriesinc.com/index.php?main_page=index&cPath=4_22_48

Thanks very much. I agree on the durability of the Thermador surface as I have been through a few standalone nonstick electric griddles in the past and appreciate the schematic in the Monogralm burner.

Any thoughts on the Monogram vs other choices as far as the range is concerned ?