There is a tremendous difference between the EP175 and EP350. I know because I started out with the 175 but traded up before the 30 day trial period ended. EP175 good for lower volume in small room. EP350 good for booming bass in small to medium sized room. Would probably want the 500 or a pair of 350's for a larger room.

My room approx. 8 x 16 with vaulted ceiling 8 x 12, with 1 small opening and 1 large opening.

https://docs.google.com/spreadsheet/ccc?...amp;usp=sharing