New TMP. Fender FR or Studio monitors?

I just received my TMP on Tuesday and have played it through my headphones and into the front of my TM Twin Reverb.

I am hooked on the TMP, so I am going to move away from the TMTR even though it's only a couple months old.

I only play at home in my office/guitar room which is about 10x10. I will probably play quite a bit through headphones but need to decide on a Fender FR (12 or 212) or studio monitor like the Kali LP-6 v2 or Adam T5V for when I want to play without headphones.

I am also going to upgrade the Audio-Technica ATH-M40x to Beyerdynamic DT 990 PRO X headphones.

Any thoughts on FRFR vs Studio monitor?