I just purchased a Vermont Castings 4 burner and it works great. sides of the lid are cast iron as well as the grating, really keeps the heat and sears very well. Consumer Reports rated the 3 burner version as best buy if that helps.

Jason
M80 v2
VP160 v3
QS8 v2
PB13 Ultra
Denon 3808
Samsung 85" Q70