Your listening area is on the small side, so it's a tricky one, as bigger baffle speakers need space to 'disappear'. If you really want to enjoy a PMC speaker however, you should not go for anything less than OB1; the lower models, although they image very well and are fun to listen to, always left me frustrated due to the lack of mid-range definition and bass weight; they also feel a bit light-weight and toyish for the price.
See if you can get a home audition; it's very difficult to tell without trying it in the acutal room.