One comment has come up a couple of times is why are we buying them?
Hmm. I bought a used CPR Bakpak with the Rio600. After a short while, that pump lost its pinache for making bubbles, so I bought a replacement. Seems logical.... it came with one, so replace it with the same, right? The next one worked okay, but I'd been reading threads about using a MaxiJet instead. Everyone said you'd need the venturi kit, but of the
five LFS in my area, NONE had it! So I rigged my own.
In the meantime, I fixed the original one, and cleaned up the second one. And they went into the garage.
The only other time I purposely bought a Rio was when I was mail ordering from Jeff's Exotic Fish. After talking with them for a while on the phone, I decided to buy the Rio 2500 for doing water changes. That way I could pump the water into the tank instead of lifting a 5gal bucket over 5' high to refill my tank. Now remember, it is only for water changes. It runs for maybe 10 mins to mix the water, and 1 min to refill the tank. Then I rinse it out and put it in a nice safe spot in the garage. Within a few months, it wouldn't start unless I hit the side of it. Go figure. I did talk to Jeff while he was here at MACNA, and he told me he'd let me exchange it, but I never followed up on it. After all, hitting a Rio can be a great stress reducer.
The other ways I get Rios is when I buy stuff from others. My 55g came with a Rio2100 (which sounds like the most dangerous one of the line, according to these posts), and a Rio800 on a Remora I just picked up. That little 800 didn't restart after my GCFI tripped, and I had to hit it to get it to start. As soon as it got near the skimmer again, it wouldn't work. After getting it to work, squirting saltwater in my eyes and then into my PC ligthing that was on, the GCFI tripped again.

Got everything dried off, hit the Rio again and got the skimmer going. Lights worked, all is well again.
But I don't go out of my way to buy Rio. If anything, I seem to magnetically draw them to me! :lol:
On the other hand, Penguins (2) have worked for years, but do have problems restarting after a water change. They seem to suffer from an airpocket issue. Maxijets are excellent. Mag drives are excellent, and affordable. And then I've got a few of the one with the occillating outlet that only works for the first few days, that fall off the glass and move the substrate to the other side of the tank. Those are junk too.