Happened at the right time for me as well (almost bought a 9940x when it was on sale). Plugging a 10980XE into the Dark definitely makes for an interesting proposition, higher TDP or not. My dual MO-RA3s got that covered.
Have to see what the real prices are but might be worth torturing a 10-14 core doubt I'd do an 18 core seeing the 14 core 9940x core temp spread is total crap 19c doubt these newbie will be better at that rate.
14 core might end up as a okay 10 core
18 core might be an okay 14 core...