That motherboard (Z790-Plus WIFI DDR5 version) is $250, not $280. If you are mainly going for Dual USB Type-C, that ASUS TUF and the MSI Z790 Tomahawk WIFI are the two best options you have.
For RAM grab a 2x16GB kit, even for light tasks you might be limited sometimes by 2x8GB, and productivity, lots of tabs open etc, more RAM will be better.
That SSD is $52-53, the Samsung 970 Evo Plus is a much better SSD for the same money, and the 980 Pro is only $5 more (PCIe 4.0, a bit faster if you move files a lot), i would be looking at any of the two instead.
For the PSU i would take a look at the Thermaltake GF1 850W, it's on sale right now on Amazon for $109, that's only $10 more than another excellent PSU, the Corsair RM750e (2023).
I'm seeing $324,99 on the CPU for some reason on Newegg, is that correct? because that is a $260 CPU.
Case is excellent, if you can get it for $84,99 even better, if not, any Corsair 4000D, NZXT H5 Flow, Lancool 216, Fractal Pop Air or similar will be as good.
As someone who is watching prices almost daily, that's the lowest prices they ever got at.
So i don't think you will get better deals on anything if you wait longer, if you need the PC now, i would go for it, the prices are already really really good, and i don't see anything going any lower.
With the exception of the GPU (maybe), RTX 4060 8GB launches in 3-4 days for $299,99, so we might see the RTX 3060 12GB going around $269, again, maybe.
See if you can get/lock the prices for the other components, maybe wait until the 29th, just to check if the 3060 12GB will get a price cut.