New User, First Build. WAY Overkill or "Go For It?"

Hey everyone.  This is gonna be a little long-winded so grab a drink.  I've been dabbling in NAS for a couple years now.  I currently have a Synology DS1520+ with 20GB RAM, & (when it comes back from repair) an Asustor AS6706T with 32GB RAM.  Besides little caveats with the Asustor (ugh, please don't), they both do what they're meant to do.  However I got turned on to UR via a Reddit post.  & with the issues with the Asustor, I'm wanting to build a DIY.  First, my computer specs:

ROG STRIX Z590-E GAMING WIFI

i9 11900k

128GB DDR4 RAM

NVIDIA GeForce 1070

I run a decent amount of virtualization for work, old Windows/DOS games, & because I miss After Dark.

I want to build an Unraid server that can handle virtualization of Windows Server & Windows 10/11 so I can continue tinkering & learning things on those OS.  I also wanna use it for the *arrs, Emby with hardware transcoding, data storage, maybe some streaming, general file sharing, maybe some home assistant, & anything that I may wanna learn/do in the future.  My first thought was to put something like what I currently have in a new case (looking at the CS382 if I wanna move to a mATX mobo, CS380 if I wanna stay with a full ATX).

My question to the community is this.  I'm all about overkill when I can because why not?  LOL.  Am I thinking WAY too much overkill?  I'm thinking that the N5105 in the Asustor isn't gonna do a lot for me for needing to do for virtualization.  That & I might find more use cases through Unraid for doing more & more as I learn more & more.  Keep in mind my daily driver's specs listed above.

I already thought of using those components in a new UR build, but my wife likes the computer hanging on the wall (it's in the Thermaltake Core P3 mounted on an articulating TV mount).  My new build would replace both the Synology & Asustor units.  

I have the itch to build something that would rock anything I throw at it (outside of gaming).  But am I seriously potentially wasting money?  Also bear in mind that I'd rather not have to upgrade any components in it for some time.

I'm glad to answer anything else.   Thanks in advance.