THX speakers for HT?-Atlantic tech 450,s, M&K 150s

I'm looking for speakers for a home theater. The room is about 3,000 c.f. Use is 85% HT and 15% audio. Marantz-18ex receiver. I like the Atlantic Technologies 450's and the B&K S-150thx speaker sets. Both are in the same price range but I can't deceide and also don't want to overlook other options. Any info or suggestions appreciated.

PS. My wife hates floor stand speakers.