I7 7700k upgrade path?

Currently my Unraid machine is an Intel I7 7700K (old gaming system) and my current gaming PC is a Ryzen 3700X.  I also have an unused Intel Dual Core Pentium Gold G6405 (Comet Lake) from an old GPU mining rig I was running a few years back.

In the very near future I am looking to upgrade from my 3700X to a 9800X (brand new build) and will therefore have left over hardware.  My initial plan was to give the 3700X to my step son for his first gaming PC as it still plays fortnite, etc. perfectly fine, however I was then thinking about the other two systems.

I also rent a virtual private server for my unifi controller, costing about $8 per month.

Plan A is

New 9800X for me

3700X to step son

7700K remains as Unraid box (Plex, *rrs, etc.)

G6405 potential to conver to a firewall to replace my Unifi USG, or use as a linux box to host home assistant, unifi controller, etc.

I am now considering Plan B

New 9800X for me

3700X to replace 7700K Unraid box

G6405 replaced with an Intel Core i7-10700K for step son

7700K - e-waste?.

I know the 3700X would make a better unraid box than the 7700K, meaning I would not need the second machine for HA / Unraid, however I also believe setting up a 3700X for unraid is a little more work due to no integrated GPU?

I'm also unsure if it is worth upgrading to an i7-10700K when it's only about 10% better (userbenchmark) than the 3700X?

Pros Plan A

I only need two rack mount cases, one for the Unraid box and one the HA / Unifi / Linux box.

Cons Plan A

Need two boxes, as the 7700K is starting to slow down.  
Need to upgrade machines to 2.5G ethernet

Pros Plan B

Quicker Unraid box

No need for second Linux box

Slightly faster second gaming PC

2.5G Eth already on the ex mining rig, so only needed for one other machine.

Cons Plan B

More expensive?

More difficult to set up 3700X as Unraid?

Is there anything I've missed?  Anything you would do differently? Or would you go option A or B?

Thanks

Edited March 16, 20251 yr by skot4th
pros vs cons