I recently started looking for a stove top grill. I wanted a reversible two burner size. After doing a little research I found that most people didn't like the inexpensive aluminum ones so I looked at cast iron. If you have looked you probably know that the Le Creuset double reversible is about $170. Sorry I didn't want to deal with the extra hassle of plain CI. Anyway in case anyone's interested I found a clearance sale on the LC reversible single burner model for $60. After trying one and liking it I bought a second. While there is a ridge where they join, it hasn't been a problem. A couple of trade-offs to that inconvenience are that you can have one griddle up and one grill up at the same time and since each one is lighter it's easier to clean.
I have no connection to the supplier. In case you're interested it is cutleryandmore.com