@Old Duck - Frontier will give you a 'key' for Oculus free - which allows you to launch it without the steamVR overlay. DR Kaii I also recommend as very useful.
Shadows and AA use an unfair proportion of GPU power and very good results can be had with mild SS and those settings reduced.
I'd think the 2070 chipset has a reasonable enough grunt to not need to drop much (if any) 'quality' to play. (My 1070 laptop is ok with ED on mostly Ultra settings but no SS)
Recent improvements in the Oculus runtimes mean you are 'joining' with the software about as good as it gets (until the next round of optimising)
I recommend once Oculus software has installed to go to 'Settings', 'Beta' and turn on Public Test Channel (beta) as the current, V12, appears very stable.
ASW (Oculus) will 'smooth' out most of the lags, but expect it in stations, they are incredibly detailed in the activity going on...
Enjoy the rift S - there is little to compare to PSVR, really
