A pair of floor standers would be on average around -3db down at around 30Hz so with the amp gain of 3db at this point would be 0db at 30hz. To me the redgum would help slightly to get a little bit lower down the bass frequencies(only minor though). Below is a Nad M3 frequency response for comparison.
as i suggested way back, the projector should be mounted as close up as possible. I wouldn't trust the calculator outputs, theyre good as a guide, but anyones guess what settings they are outputting at. if you have mimo as contact id suggest knows a bit about epsons and can advice output wise what to go on.
the epsons DO NOT have an adjustable iris. it has dynamic iris but not one like the jvcs you can set for output. what they have is power settings. however as mentioned you want to run it on lowest lamp setting as higher ones really go out in colour balance etc.
as i mentioned earlier I would suggest moving the front row back a tad, to 4.7m. it will help audio wise. just remember you will fully resolve 1080p as far back as 5.7m however no 4k is unlikely be anything you are going to be resolving.
these projectors are lot closer than people make out. as a previous epson owner I can tell you the jump to a 3 times superseded jvc was handy but it isn't like the epson is rubbish. its a very good projector as happens certainly lot better than some other options i can think off. I for one preferred the epson at time when I got one to the sony that cost more for instance. so yeah i would trust your eyes
Be patient, take your time , looks and listen to systems in shops or invites to people's systems.
if you rush in, you may risk disappointment.
Consider your system and and see what's needs replacing first .
I'd Piersonally look at your CD player first and then close second your amp and then your speakers then your turntable. But that's just my opinion.
There are are plenty of good buys here on sna and with time you could assemble and awesome system for $10k thats worth more. Originally.
one thing to to consider is either CD players or amps with the days built in. There is a risk they will go out of date , but good Sound is good sound regardless of what dac chipset or rate.
Agreed on the above choices of the dyns and Hegel ( che k the Hegel has phono inputs unless you want to get an external phono stage) and add the below SACD player for instant upgrade in sound.
And a good turntable