I have been very pleased with this machine. Coming from some very loud, cut-rate screaming monsters this has been a great vacuum. It has a pleated filter setup and replacements are reasonable. I am waiting to replace mine until all of the truly nasty mouse nest removal is done. Amazon still sells this model and I can tell you that if something were to happen to mine I would not hesitate to replace it asap.
You can buy the machine from amazon here, full disclosure, if you buy from the link below I get a few pennies from amazon's pockets.