Do yourself a favor a put this on hold until you have ALL the parts. This is a pain in the arse to do, so if you do it wrong, don't replace the right parts, etc., I can guarantee that 1000, 10,000 maybe even 25,000 miles down the road, you'll be ripping into the motor again.
I took the approach that I only wanted to do this ONCE for the time I owned the vehicle. So personally I replaced everything I could, especially everything that came in contact with the timing chains. Added to your list would be all 4 cam phasers, 4 cam phaser bolts, all 4 VVT solenoids (These get clogged and don't flow proper oil to the cam phasers), and the idler gear (listed as AUX pump). For good measure I also replaced the coolant crossover tube, the water pump, harmonic balancer and the lower radiator hose. Unless something fails, I have absolutely no reason to rip into that part of the motor again.
Do it right the first time or don't do it at all, because if you have to go into it again, you will probably have to replace the chain and a lot of bolts/gaskets again. So you'll be paying for it TWICE in the long run.