Vandersteen 5A Speakers

It should work as good, probably better than the 3As. I have a similar sized room and just upgraded from 3As + one 2Wq to 5s (not 5A). The 5s sound better all around and while I haven't played with the low frequency EQ yet they have better bass (deep but not boomy) and are more open sounding. I don't regret it. As Daverz points out eight feet is the minimum listening distance, but you should not have a problem with that.

No problem with Vandies being adjustable in Room compensation
Johnnyr

If you look at the Vandersteen website...click on the 5A owners manual....it gives a graph showing suggested speaker placement. See if it works in your room.

Audioconnection said it well...that plus, I've never let the room shape/size dictate the speakers I own.
That doesn't mean that I haven't had more and less success in terms of sound.
Knowing the golden ratios by heart, doesn't mean that any of us are fortunate enough to have such a room.
Also, I'm such a fan of 'Nearfield listening', that I can simply put my chair wherever I want when litening time is available.
Go for the 5's--they're absolutely wonderful speakers.

Good listening,
Larry

Thanks for the information.

Russ