Direction on my next upgrade


I am a year into my journey down the audio rabbit hole. I am enjoying all the incremental gains and enduring the miss fires. My system is as follows:

Rogue Audio Sphinx V2
Fluance RT85 with Ortofon Blue
Epicure M150's completely rebuilt with kit from Hue at Human Speaker.

I am trying to figure out the next step on my journey. I am considering the next steps.

1- send the Rogue back to be upgraded to V3 which has a much better phono stage($500)
2- switch to a MM in the $500-$750 range
3- switch to a MC cartridge
4- add a seperate phono stage under $1500
5- add a subwoofer to the party

I want to pick the one option that will give me the most improvement for the money. 

Thank you in advance for weighing in with you knowledge and opinions.

Charles
cpdkee
Have you used this Raven amp that you always recommend? Why do you think it is so special over many other amps that are on the market? 
I have a stellar record when it comes to figuring out what is good based on reviews and comments. Read willgolf, he had a Reflection MkII. Then watch this https://www.youtube.com/watch?v=Gcd76DZmbdY

Post removed 
You will always get your biggest upgraded from speakers
Iam a fan of Vandersteens started with 2ce sig II now I have Quatros
I also owned a Rogue Cronus mag Rogue and Vandersteens work good together 
Vandersteen just came out with a new model 2 you might be able to fine a deal on the last model 2

Enjoy the music
Tom
I really appreciate all the input. I think I understand that some of my options may have diminishing returns and probobly waiting until I am ready to drop a larger chunk of cash is a better strategy. I am really enjoying the journey and honestly think my set up sounds pretty good for the money I have put in. I am going to upgrade the Rogue and enjoy for a while. Looks like speakers or a better integrated will be the future debate.

 I will say that the better my music sounds the more I want to listen. My music listening time has doubled a day since I have improved my setup. Tv is an afterthought. I am fortunate that my wife loves music too. It helps her Dad has a $50k plus system. 

Cheers everyone

Cpd
Guy's your wearing me down I'll say it again. 
Start with a room that has been treated acoustically otherwise 
you'll  be chasing your tail.
I assume since the OP didn't mention any that he's still 
dealing with whatever is going on there. 
Once treated as far as you care to implement, then start 
with gear changes.

Both rooms I've used for music were substantially improved
and allowed me to differentiate between how the room sounds 
versus the gear.
It took me awhile to become a room treatment prognosticator 
but I wish it had occurred much earlier in my journey.
Great gear in a so so room will still be so so unfortunately.