Welcome, Kash - Of the skis on your list, more or less agree with the others. first, do not get any ski in under 170. Period. Second, if you ski more out west, the 8K's are great, you'd probably do fine on either the 172 or 178, more depends on what kind of turns and speeds you like. Bigger turns or higher speeds, then the 178. The 8K is the most forgiving of the lot for technique, you can slide it, scarve it, carve it, great in bumps. But will want some speed and control on your part to actually carve big arcs. In the 178 could feel cumbersome in chop if you get backseat.
If you ski more back east, the Whiteout is a clear pick over the 8K. Quick, super grip and very stable at speed. But it'll also ask for more from you. You'll want lessons to really get it to give you its best. And not an ideal bump ski.
The Watea is the wrong one; you should be looking at the 84, which IMO would be marginally more versatile than any of the above for an all-around everywhere on the mountain high intermediate, but close call. Ditto for the Lord; you should be looking at the Sollie Fury. You would want it in a 170.
Conclusions: If you like to make turns and plan to get better at carving, all sides of the U.S., all kinds of snow, go find a Watea 84 or Sollie Fury. If you like to rip and see yourself more lured by the backside, soft snow, get the 8K. If you want an ice skate you can rip on, the Whiteout.