That’s a pretty big room. I’d say over 6000cuft assuming 9’ ceilings.
From SVS, I’d consider at least a pair of pc/Pb 4000’s, and maybe a pair of ultras. I would also consider very capable towers as mains and possibly as a center as well. @danzilla has 3 JBL 590’s as LCR and loves it. I understand though wanting to be IW too. Where are you located, generally speaking?