Im building my new personal tank with a 4 way OM and a wavysea. Im not a fan of Tunze, they are a great product, But I dont like looking at powerheads in the tank. Seios are a great inexpensive alternative, Maxijet mods break (from what Ive heard, no personal experience)
Seaswirls break, I had 4, in 3 years I replaced 4 motors, one caught fire and melted and in the end only one was still working. Not a very good return on my investment. I never messed with them, so I know I didnt break them (you cant manually turn them).
Ringworms wave box looks cool, although its a bit fast for my liking, it almost makes me anxious, not relaxed. I would also worry about the life of the tank taking a beating like that every day.