I was looking at the 600HH on Amazon. But you're right -- the 550 looks better. I'll have to ponder. Thanks for sharing!

Is your Levoit an ultrasonic or evaporative? If it's ultrasonic, have you had to deal with white dust? The Levoit LV600HH is easily the humidifier I'm the most interested in, but the white dust from my current ultrasonic humidifier is a big problem for me right now.

I got the Levoit ultrasonic humidifier because it seemed so popular, and now I see why. It’s awesome. Here’s the link on Amazon