How far can room treatments solve boomy bass?

I wouldn't go against Madfloyds input. But it is not a bad choice buying PARC. As always there are different opinions. But to be clear, this is among the very best of choices. I experience no sucked out life in my my system. Buying a digital dito with inbuilt dac means you no longer can obtain what cdp you prefer as those digital room tuners uses the inbuilt dac.
Buy a used PARC and try it. Or have a home trial. Do remember, the room should be measured or you'll end up setting it up wrong. It is very much more difficult coming anywhere near using an analog spl meter than for instance XTZ Room analyzer pro II. I should now, i have them both. I also feel i have to put another thing into this subject. When you measure, set what data you'll get at the PARC. Also try to change levels of deduction at the PARC. That is to say, if you are about to drop 10/5 or 3 db as an example. Do try to go back with 5-10% increments in level.

Do this until you are satisfied by ear (fine tune by ear). The data you'll get from Room analyzer will give you frequency, Q-value and actual mode(s) in db. It is the db levels you tune by ear if you feel it don't sound as good as it looks when measured.
This will all be veryfied by Richard Bird at Rives.
It is very easy if you get the PARC and Room analyzer.
For best results, also try acoustical devices. Gik acoustics is a good choice as mentioned.

I have a wide and deep soundstage which is very vivid and smooth with great dynamical impact. I wouldn't even jump this thread give my point if i wasn't satisfied.

Room treatments, if you haven't guessed already ,can have a tremendous impact on the sound of the bass your system puts out. Are you convinced at this point?

When I started work in my small work I needed to take action to address problems in the low octaves and these were created even by small monitor speakers interaction with the room. From the outset it needs to be said that one should expect unevenness in bass at some point(s) in the low and mid bass frequency range due to room modes as discussed above.

Armed with Roger Smiths book and measurement tools from XTZ and REW I was able - over a period of time - to make meaningful remedial action. My story is here.

As the story goes acoustic treatment applied to small rooms can address bass boom issues and thankfully can enhance listening pleasure by addressing other small issues to - like slap echo.

I have timber floors using spikes for my speakers, its a suspended floor. I get bass reverb, any suggestions to get the speakers decoupled from the floor would be great!

I know what I am going to write is politically incorrect but it has proved correct in my humble experience. I was brought up on the evils of equalizers and I shunned them all my life up to a few years ago. I have Pioneer TAD 2404s in a relatively small room with with a large bay window on the right-hand speaker side and sub-optimal positioning - they are firing across the short walls and not the long (this is my concession to my wife). The bass was boomy and it obscured significant detail. This was largely cured by the insertion of a BSS FCS 966 30 band graphic equalizer just before my power amp. It is set for significant bass cut particularly for the right channel and some treble cut. The settings were determined by one of the most distinguished US studio designers who has been in the business for decades and who spent several hours using some pieces of gear which I understand are no longer available. So I do not know how easy it would be for an ordinary mortal like myself to attempt to determine the settings. So my post may not be that useful. But after some 40 years in the hi-fi hobby this was a revelation to which I had to be dragged screaming before I would give up my prejudice against EQ. IMHO EQ works very well if done right with a professional piece of gear like the BSS. My room is also quite reflective and it has benefited considerably from the placement of some custom acoustic absorbent panels. Again, I had to be dragged screaming to this realization too, but it was easy after hearing the natural resolution of a studio room designed by the same studio consultant. But in my experience, this type of add-on acoustic treatment is great for absorbing stray sound waves to give you more detail but does little in helping speakers that overpower a room with bass.

I hope this helps. I am posting this not to upset people with firmly held differing views but just to let the OP know of my experience.

Enjoy the music!