Great looking car - congrats!
Good advise on the keys. People don't always realize how many you're supposed to be getting - I got 4 with mine (2 remotes, 1 valet & 1 spare that's folded flat in a card holder). The dealership had to order the second remote. Floor mats we're also not in my vehicle - the dealer got me a brand new set of Lexus OE mats.
Also good advise to check it during the day time for any damage, scratches, chips, scuffs, etc. Another thing, if possible, is to check it at night - make sure all of the lighting is working properly, the dash lights work properly, etc.
Play with everything: power seats, windows (all of them), moonroof, radio, compartments, fold the seats down. Everything that you can think of (mechanical & electrical). After you sign the papers - it's usually too late to bring up any problems.
Thanks for sharing your experience. Great advise!