Infinity IRS Betas - proper amplification

I have read these forums for years and I am finally joining after
buying a system that I think demands more commitment to this hobby than I have had before. I am hoping for a contrustive and thoughtful discussion of what my best/most reasonble ($) choices are going forward. I do ask that people not snip demeaning responses about things they might consider obvious. But solid probing questions are welcome. 

My room is roughly 16x24, with a vaulted ceiling that passes to an upper floor running 8’ high from the 24’ wall where the speakers will point up the vault. (Day 1 -any way) 

My current systems are all varying degrees of vintage. Long story short...divorce...Very early Cornwall’s...upgrade to separates (mac MC2100s bridged) off a Decent Yamaha HT integrated., added a Miller kriesel sub and off I went....as is
great but “Klipsch need tubes...” enter mc240, c20, mr71....(now my bedroom system, its a big room) primarily CDs.....scored a roached set of
JBL Apollo 51s,now redone with an N1200, D130 Bs and the standard horn...enter highly modified mc60 monoblocks run though a sunfire theater grand 1 always in source direct off a decent dedicated music server (nothing special laptop) I
dont hang in a huge audiophile group, but some musicians are in the
mix, aside from the magnolia no holds barred theater room I had never heard
anything that made me smile broader than my stereo playing. Saturday night  was
”One Slip” played at (-5dB) (I live in the woods) It was really special....UNTIL....

Last week a local stereo buff listed his one owner excellent condition 10/10 aersthetially last production run IRS Betas, he asked for half of original retail....I now own them.....

Now I am at the OMG, what have I done....he had an easy 15k into his system not including changes over time. Yes, I am getting to the
obvious

What now! I am going to dust off the 2100s for the low end, the mc60s even into 4
ohms are not enough (he ran a sonic frontiers 2 ($2k if I want it (sovetek kt88))) I don’t think I need to worry about the demand on the 60s (PLEASE CORRECT ME IF THATS WRONG) though I am concerned about the polarity(?) as they are heavily modified with filter tubes replaced with filter caps and a huge capacitor in the signal path to
punch harder (I am not an electronics guy but the techs I have taken them to over the years all say they sound and test tight and clean. (I agree ;)

i have tried to be inclusive and I hope folks will have constructive thoughts to share, obviously this won’t be cheap to pair up and I would prefer to learn before I spend $$$.
 Lastly....I Love most music and see live stuff at least twice a month.I  listen to deep earthy blues, ska, some jazz, but more on the funky side. Smiths/cure/stone roses...very little hardcore outside of live shows (But, Ride On by Bon Scott is
a beautiful thing) I also host about 1 party that usually evolves to dancing.....

Wayyyy more than I planned to write...with my thumbs! 

The typos are....just that😮

respectfully,
Walt