NHT Classic 4 or AV123 Strata Mini?

I am in the market for some new speakers and what I am trying to accomplish is getting rid of a powered sub.
My room size 12FT wide by 17FT Long.
I will be driving them with a Wyred 4 Sound ST-250
Any thoughts of which one would work best for my situation.
Or any other Tower Speaker New or used that would fit.
Thanks for your help!