Your room size is smaller than my family room (18ft x 20 ft x 12ft ceiling, open to 3 sides - formal living, kitchen, & dinning).
So big loud speakers is probably not a good idea.
May I also suggest another option - the TAD 2201 Pro Monitor.
I bought them for $1691/ pr delivered (original MSRP $3000). If you buy 3 pairs, Music Direct might sell them for $1500-1600/pr.
These are the Pro line of TAD. The least expensive consumer TAD speaker costs $30,000/pr. The Pro TAD may or may not be designed by Andrew Jones, but the TAD label means very high standards, whether it is Pro vs Consumer, Speakers vs Electronics.
When compared to my Revel Salon2, KEF Refernce 201/2, B&W 802D2, Linkwitz Orion3, and Philharmonic 3, these TAD 2201 Pro Monitors may not have as large a soundstage. Their soundstage is a little smaller and more intimate IMO. But their clarity and imaging is uncanny and second to none IMO. These TAD Pro are designed for ultra accurate & clear sound reproduction. They measure extremely well. Their sensitivity is about the same as my 802D2. IOW, these TAD 2201 sound as loud as the 802D2, but significantly LOUDER than the Salon2, KEF 201/2, Orion3, and Philharmonic 3.
When paired with great subs (like your Seaton), these TAD sound absolutely amazing IMO. The cabinet shape is a little different, so I don't know if your wife will approve. Edited by AcuDefTechGuy - 3/21/13 at 11:19am