Humminbird 398ci Si Side Imaging/GPS Combo

I came across this unit and thought it was pretty interesting. It seems a bit strange that hummingbird would jump from offering the 798CI SI for $1050 and then jump down to the 300 series for their next SI unit. Maybe the 500 series SI unit is currently being developed? For about $500 it's interesting but probably beyond my current FF budget. Has anyone seen or played with one of these in a store yet?

http://www.austinkayak.com/products/12545/Humminbird-398ci-Side-Imaging-Combo-Fishfinder.html#!

http://store.humminbird.com/products/666527/398ci_SI_Combo