I would grab the new OEM gallery gasket plus Z1's hardware. IMO it's better to stick with the updated metal reinforced composite gaskets as they're the best at the moment.
The new OEM primary chain does come with new markings, there's no way the sell it without the marks.
Everything on your list is great, but I personally haven't seen any of the guides, chains, or tensioners fail on these. It's definitely not much over keeping them but just keep that in mind.
One thing that I would definitely change is the actual CAM pulley or whatever its called. I diagnosed this weird issue on 2 09 370Zs, where the cam encoder would fail and cause the car to run funny or not run at all.
JTW has a pdf about it -->
http://www.jimwolftechnology.com/wol...derslipped.pdf
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Creator of the GTR TT Conversion Kit, NA Record Holder (401WHP)
Ecutek Master Tuner (VQ37, VR30, VR38, B58, S55, S58)
BTWTuning