^I've been considering ARC as well.
Honestly.. my current room doesn't stand a chance acoustically. Which is why I dont think much about it's acoustics... yet. I'll try to take a picture tonight if I get a moment so you can see what I mean. There's no saving it... the only choice is to make sure my house has room for it. Since I moved out of my old townhouse i've been banished to a concrete-ish corner of the basement lol. No chance to get any type of accurate sounding room... unless it were something like the software you guys are recommending