Physically, I don't think there IS such a thing as 'too big', as long as it fits fashionably...but the diminutive size of the SuperCube Ref is a size I would like to stay close to...even an SVS tube would do the trick...the room is 20 X 12, with 10' vaulted ceiling and open on one side to the kitchen, with a doorwall on the other side...I have no WAF to worry about, so it's all about performance...bang for the buck, ya know? Since I have all DefTech's now, I thought the Reference would be what most 'matches' my set-up...but if I could afford it, I'd go with a Trinity....I don't think there is such a thing as 'too much' bass...as long as it's crisp, clean, not boomy, and the higher the SPL the better. If I broke some windows in the process of finding out how high I should turn it up, that'd be OK with me. My local guy will sell me a NIB SuperCube Reference for $1,600 out the door...but if I can get the same performance for less, I'm all for that! What might you suggest?