I also agree with Michael that you don’t have to go over the top in spending huge amounts of money in expensive monitors.
I would organize things this way
1) size the monitors to the size of your room. If it’s a small room some big monitors will not be adequate.
If it’s a very small room get some small monitors like Genelec 8020 ou Adam A7. If it’s a Mid sized room get some mid size monitors…
2) check options from Genelec, Adam, Focal.
I’m not a fan of Focal voicings, they don’t work for me, but some people really like them and they have offers for different sizes. I would get something from $1500 to $2500, maybe try even to buy some good 2nd hand speakers.
ATC speakers are also quite good, but those are much more expensive I guess.
I personally use ProAc Studio 100, I’ve been using those for 15 years so I’m pretty used to them and like them a lot. I use them with a consumer hi-fi KEF subwoofer, and power them with a modified Quad 405. I would like to upgrade the Amp but still didn’t get money for a Bryston.
I also have the Genelec 1030 as 2nd monitors that I like a lot because they fit well in my room size.
3) without acoustic treatment no monitor will sound good enough or trustworthy to mix.
There’s a lot of misconceptions about acoustic treatment, you dont need to go over the top to have a controlled room neither you have to spend huge amounts of money.
Acoustic panels and bass traps are cheap if you do them yourself, it’s just wood for the frames, Rockwool and fabric and those are very efficient.
Start by doing Bass Traps at all corners, then absorptions panel in the side walls to absorve first reflections, acoustic panels for a Cloud on top of mixing position, then maybe diffusion or abaritona in the back wall, that’s it. That will get you to a pretty good spot already, then listen and measure and check if you need to retouch or add something more.
4) get some Sonarworks acoustic correction and calibration software. It comes with a measuring mic, you do all the measuring process, it will give you and EQ to apply for correction, and you can change and tune that EQ to taste
5) then for last but as highly important as all the other steps above you need to get to know to your place very well. You need to get used to it.
So mix a lot there and at some point you will get so used to the way things sound in your room that you already naturally do the mental compensations for it while mixing.
This will have to happen in any room , in any studio, there’s no acoustically perfect studio or monitors, you will have to get to know and get used to how things sound in that specific place.
I produced a record in Abbey Road studio 3, we were there for 3 days. Although we were in the most popular studio in the World I couldn’t make any decisions in that control room, I had no idea what I was listening back and couldn’t trust any judgement, I was lost really. So I ended up using my cheap Sony headphones for 3 days in a very expensive studio, it seems ridiculous but it was the only way of making decisions based on a monitoring system that I knew.
It’s not that the control room was bad, simply I was not used to it, it was very very dry, and I was used to mix in a Dead End Live End control room, quite the opposite, so everything sounded weird to me.
Talking about headphones, I know my Sony headphones so well and been using them for so many years that I can mix a full Album just on them and it will sound pretty good, and if I have to do that I don’t even miss any of my monitors, it’s completely fine.
After you know your monitoring for so many years its starts to be printed automatically into your brain.
We listen with our Brain not with our Ears
Hope this boring post helps
Best regards