Can't comment on the Rios, but I'm very happy with my Hagans. I've got about 5 of them between my 2 tanks and they are great. Very quiet, don't seem to generate any heat, and they hold up well. I've only ever had 1 problem with them. I use one in a rubbermaid tub to mix up fresh saltwater. I use a airline with the powerhead to airiate the water. Sometimes I can't get the powerhead to pull in the air from the airline... but I'm not sure why. I'm not sure if it's a problem with the powerhead or something else (i.e. me).
I recommend them.
FWIW... I've also heard very good things abou maxi-jet powerheads. I'm thinking about trying one to see what all the talk is about.