It appears on the Sirena website thsat they are closing out the blue model as they are introducing the new Platinum model. New 12 year warranty, new power nozzle. The PN is not my favorite part of the blue model, so I would be interested if it is improved.
There are even some refurbs offered for $395, and financing available.
[URL unfurl="true"]http://sirenasystem.com/[/URL]