I have a Durrmaid and have had problems as well, two pump failures thus far. However, I do have to say the Dennis Durr (the owner of the Durrmaid company) has been very accomodating, and has always promptly mailed me replacement pumps, without even requiring me to send him the old one (which I still did out of courtesy.
That said, I'd have to agree with everyone here, if you're really going to need to use an extractor everyday, go for a bigger model. I'll be investing in a Mytee myself.