Hi I'm Tim, I wouldn't recommend the repair 600-700 dollars is a lot of money to put into a unit and is not out of line for a transmission replacement for that unit. Typically units last between 8-12 years and frankly Maytags are not what they used to be. They have had transmission issues and also leak issues in your particular model and there is no guarantee that it will not fail again or have any other part fail in the near future. As far as a newer unit goes Maytag is now owned by Whirlpool, so anything with a Whirlpool or Maytag name on it is one and the same. Hard to recommend one particular unit because there are so many different models to choose from with so many different options to choose from. My recommendation is the simpler and less efficient you have the less to go wrong, but that's up to you. Efficiency in a washer typically reduces the water temperature and amount so the more efficient the less water and the lower the water temperature. I think the Whirlpool built models are the best, XXXXX XXXXX personal opinion, the difference between the Maytag and Whirlpool would be maybe a different look to the control panel and different options but the guts are the same.