Morningstar and Blue Sky would be my picks for a small MPPT controller. However, with 200 watts you've already got a potential for nearly 20 amps. Depending on how much you want to add a 60 amp controller might not be a bad idea. The Outback FM60 or Conext XWMPPT60-150 would be great choices. MidNite solar makes some nice ones too but I don't have any personal experience installing any of theirs. We always go with Outback or Conext since they also make inverters. I like to have all the equipment in an off grid system match so it can communicate on the same control bus.