Nice setup! Debating on the trunk liner as well. Already got interior Tuxmat setup, and their trunk mat is $150 vs Honda's for $100 (after shipping). Will wait until the Tuxmats show up tomorrow to decide which to get. Suspect Tux will be lighter weight than the rubber Honda trunk mat (less weight the better with the hybrid). Also need to think about fabric protection. Didn't get it at the dealer. Maybe I can find something like scotchguard I can put on myself (I used Klasse All in one and Klasse Sealer on the paint already).
Hmm I don't believe the weight difference will be huge between the Tuxmats and Honda trunk tray but Tuxmats looks cool

Never heard of the scotchguard or Klasse ones, but I can give you a little more info. on the one I purchased:
It's called Finishing Touch (just watch this guy's 2 min show and you'll be impressed:
)
PAINT PROTECTION: protects against weather induced fading, oxidation, loss of gloss, permanent hard water, etching, industrial fallout, bird droppings, tree sap, and acid rain.
INTERIOR PROTECTION: against fading and permanent staining caused by food, drink, and oil based stains through normal use.
and this is the platinum package which comes with 5 years warranty and it cost me $595. I'm sure if you wax it once a year for 5 years, it will be shiny enough but with this you don't have to worry about wax (they actually don't recommend waxing it with this protection because it will remain shiny at all times after each wash). Not only for wax, but it also protects the interior as I mentioned before, so it made sense when I first bought it but some may find it pricy.
Hope this helps!..