I too am working out to go with micro vs string inverters. String should be a bit cheaper and has been around longer. I have noticed RF noise in some parking lots covered with solar using string inverters. I would think these things would be shielded but just something to be aware of.
Big plus to the micro is smaller connecting wires and the ability to quickly and remotely diagnose which panel has failed. Strings require you to climb up on roof to isolate each panel for testing.
