Bought 2013 and now mods

I purchased a Prius 2 last Tuesday (3/5/2013) and now need to add the additions and mods.
When purchased I talked to dealer into putting 17" rims w/ Energy Saver A/S tires for $900 ( Dealer installing on Saturday along with the clear bra and Crystal Fusion on the windshield.
Wife wants a cover.
Need to get a K & N air filter
Install a KRITTER RIDDER to keep the wildlife off the highway (this item really works, had one on Ford Escape I traded in. Only unit with micro controller instead of a simple 555 timer chip) Here in Lemhi County, Idaho there are 3-5 vehicle/wildlife collisions per week and Idaho is 22nd on the list, go figure?
The ride is really smooth, my wife drove it home (3 hour drive) and she never goes over the speed limit (she doesn't like using cruise control) but I pointed out to her several times that she is over the speed limit. Then she discovered the steering wheel gizmo controls. What did I create by purchasing a Prius!! --- lol
According to the miles till fill up, 409miles, I can drive to Idaho Falls 2.5 times on one tank of gas(Idaho Falls is 160 mile drive from Salmon, Idaho.Curious how accurate that reading is?