Yes, the size of your room should be taken into consideration when deciding between the M80s and the M60s. If you have an average sized room with normal 8 foot ceilings, the M60s should suffice. If you have a really large room with a cathedral ceiling, the 80s might be a better choice.

As Alan (our resident expert, by the way) points out, the 60s will allow you more options when choosing a receiver. With the 80s you have to be a bit more careful to get a receiver that can do the job.

Jack

"People generally quarrel because they cannot argue." - G. K. Chesterton