I've got a Rio 3100 on my 90 that has been working for a little over 2 years. I expect it will die any day now. On my 55, I had a rio 2100. It made it just about a year and crapped out. The brand-new Rio 2100 that replaced it lasted about 6 days.
I have started switching all of my tanks to Mag pumps, since my sumps were set up for submersibles. I've never heard about a Mag cracking open and leaching toxic metals and tar-like substances into aquariums. I have heard that about Rios...
But you get what you pay for. Rios are really cheap.