Desperately need info from Mits owners! I'm shopping for the PlatinumPlus WS-55819 but have been told there's "limited availability" and couldn't be given a ship date but was quoted for $2999. The salesman at AceAppliance (only local Mits dealer) is trying to steer me toward the Platinum WS-55809 which they have ready to ship for $2799 ($200 less). The salesman told me that the ONLY difference between the two sets was that the 55809 had 5" speakers and the 55819 had 6" speakers. Surely, there's got to be some other difference between the two sets...I don't want to settle for less than the better set. If anyone can provide clarification here, I'd deeply appreciate it!