I mix in an untreated room with the amps and everything right next to my monitors. LITERALLY. I think I get good mixes. Not as great some guys like Jeff, Erms, Jarkko or Lasse, but good enough for being as new as I am to this genre of music.
You are overthinking things. Just get what you need to get and start recording. You need to learn to crawl before you walk. So taking baby steps into this is the best way to go. Get as good a mix as you can with an untreated room. Then once you treat you room your job will be easier.
Here is photo proof of my setup:
Mesa 2x12 and a Marshall on the bottom right. Those are RIGHT next to my monitors, and I still get mixes that sound like:
www.jasoncohenitservices.com/Grotesque_Test.mp3
Now of course thats not an AMAZING mix. But the guitar tone is just a single 57 on the 5150 with the marshall cab. I did it using headphones with the amps volume on 2
Haha and I thought I was mixing close to my amp. Thats awesome, The link you posted doesn't work for me but I just lurked one of your old rmts and it was pretty damn good so I think you sold me on the whole real amp vs sim. I still wanna hear the link you just posted though