I ordered one of these as well. 52" deck with the 21.5 Kawasaki. Really looking forward to it! I do have some incredibly thick and fast growing grass on my property, so I'm hopeful this unit has the power to handle it.
I will give you guys some updates in spring.

From what you outline I believe you've size up the mower and its competition. If you have driven each and have met with each dealer you feel are a reasonable distance away surely you can make a choice that best fits your situation. Otherwise, if price isn't a concern go for the new Tiger Cat II just because you can.