Powerful, smallish floorstanders with high WAF?

First thing you have to hear the speakers yourself. What price range are you considering? Check out the Scansonic MB 3.5's. They are about 5" taller but about 2" narrower. Just make sure if you do hear them that are broken in. They don't sound all that great out of the box. After 250-350 hrs you would never think they are the same speakers. Being bottom ported they can be placed close to the walls. They will sound the best if positioned about 9' apart and pointed at your shoulders.
Good luck

Used pair of Totems or Audio Physics fit the bill; they have a number of models at various price points. Side-firing woofs on the AP's dictate careful setup. Cheers,
Spencer

Just curious how op knows it's the speakers that are underperforming?   What amp is used?   Maybe amp cannot drive the Focals to their max.  I heard them once off a krell integrated and they did not strike me as wimpy.   Not sure  what of similar size would necessarily be better in that regard.    Something bigger may be needed.  How about adding powered subs?   That would take things up a level or two. 

I do not know what you mean by "powerful", but I really enjoy my Larsen 8 speakers.  I had borrowed a pair from my local dealer and my wife actually liked the way they looked!  She says that they remind her of plant stands.

http://www.theabsolutesound.com/articles/larsen-model-8-loudspeaker/

Platinum Audio Solo's....except for some 'stats I owned, these are the most coherent, musical, smallish yet powerful speakers I've owned in my 40 years as a 'phile....and speakers my wife doesn't want me to move on from.