vfrpilot,
I have demo'ed the original Criterion's in my room, 16x14, and loved them, especially with tubes. I bought the Diluceos because they gave me slightly more punch and I like to position the speakers at least 5 ft from the front wall. They image great and are just made for a small room like yours (the Criterions). I found they like a bit narrower placement than I was used to, perhaps 4.5-5 ft apart in your room would work well. It keeps them off the side wall and they really open up that way. And don't be fooled by the single mid-woofer. They will put out tight accurate bass, depending on where they are located, down to as low as 45 hz. I use a sub to fill in the very low end on the Diluceos.
Andy