If you want a new recvr, Yes 4k is worth the fight.
With the 4k, you will get either the Genie HR54 (which I recommend) or an HS17 server along with the 4k C61k client.
If you don't get 4k, you'll keep what you have.
I went to the 4k in the last year or so after having a HR 44 .... I loved the HR44, worked great.
I too had to fight to get the 4k stuff as they wanted to fight me and would only authorize a HS17 for me, which I refused.
I have HR24s in my system that I don't want to remove ...
I eventually got ahold of the correct person that could send me an HR54 and client and its worked pretty good for me, I am happy to have the 4k ability for when I want to watch 4k or find a game I want to see in 4k as well.
For me, if something is offered, I like to have the ability to have it, weather or not I use it alot or not, at least I can if I choose to.