Hence was trying to stay with same brands like all Lian Li and Asus products. Can’t find a white Strix 3090 at a decent price. Everything is 3200$ or more.I'd swap the ASUS PSU for a Seasonic FOCUS GX White edition.( Little googling suggest these are actually made by Seasonic for Asus)
That said... careful trying to do all white builds like this. Often the various white components can be different shades of white.
Build looks solid, but what is the purpose of platform change? 5900x is within 9% of 12900k at 1080p gaming benchmarks, and obviously much less as resolution goes up. May as well just throw a 5800x3D in when released, it will likely be slightly faster than 12900k.