small speaker for office


I'm thinking about EPOs 3, Silverline Minuet, ERA D4, room size is aprox. 15x18, using NAD 7155. My budget is $400 max. Listening to rock, blues, acoustic, of the three, the best or other suggestions. Will be bought unheard. Any thoughts??
earthquake
Making a BIG mistake if you don't consider the little 3/5 variations from Spendor, Harbeth and ATC.
I also use the ERA D4s in my office. I have gone through several amps, but the ERAs are keepers.
room size is aprox. 15x18,
if you are thinking of a pair of mini boxes for that size room why not go for a Used pair of Vandersteen 1 C would take up about the same space and
offer a fuller satisfying balance.