As I said on the phone, given where you are in your quest for 2-channel goodness, I wouldn't even consider upgrading the crossover now. My previous post in this thread was meant only as a reminder that, as good as you will soon have it, it can be even better if you wish to go 'whole hog' in the future.
Point being, I consider the crossover upgrade an option for future consideration, way in the future. It is not now nor will it ever be an imperative. Shoot, I don't even have *my* Timepieces upgraded.
I think you did an outstanding job of getting maximum performance for the $$$ spent. Spending more now would be silly IMO... or worse.
-Jim