Thanks! I am assuming that both have the Frog mats that ship with the optional bundles and are the same sizes. I don't think you and I and others that chose the 700 over the 590 will have as much trouble keeping the food within the drip tray. The size differences wasn't the only reason for my decision to go with the 700. The thicker steel played a big role too along with the extended warranty. Thinking ahead, and like Ross said, motors and electronics will likely be the biggest troubles we will face.
There was only a $200 difference in my comparison of the grills and bundles including the mufflers for the 590 lol. If I can save on buying a board or motor with the 4-year warranty difference, that will more than make up the difference in the initial cost.