My advice is don't sweat the room treatments so much at this time. 99% of people never modify their room and live a very happy normal life. If you seek advice on audio forums, you are hearing from the 1% or whatever that truly enjoy tweaking their systems and rooms to push the top levels of performance.
Yes, a room can make a big difference in sound properties but I'm betting that your enjoyment levels from the new speakers will surpass your expectations even without delving into finessing the room. There is tons of time to play around with that later.
