Well I've decided on the Shiva MKIII with the PE 250w amp. Ijust cannot decide on an enclosure. I would luv to keep it as small as possible, but am willing to forgo the small size for the ultimate output. Am undecided about sealed or vented as well. It will be mostly used for home theater, but want it to sound good for music as well, mostly jazz, classic rock. My main speakers are Polk LSi 15's. My room is about 15' x 16' with no rear wall (opens to kitchen). It has 10' ceilings that are vaulted to about 15'. Thanks for any and all help. ps I have extensive woodworking skills, so am willing to consider all options.