I am guessing that new cabinets and counter tops would be the most expensive part. While those are out, and possibly the island if you have one, the new floor replacement shouldn't be that expensive (depending on what you want).
That would be a tough decision since your present unit has a lot of costly recent upgrades that you really won't get your money out of. Of course if you remodel and stay with a 12 year old unit you will still have aged fiberglass, but on the other hand the overall quality could be better with an older unit.