I think you are concentrating far too much on a single spec. 2 way speakers are usually pretty easy to drive for almost any solid state amplifier, and usually have a very benign minimum impedance around 4 to 8 ohms.
How is your room? I would reach out to GIK acoustics before doing anything else. They could very well fix your problems. :)
After this, I'd try some rather modest but stiff amps if you still felt you had a problem, such as a Parasound A23 or A21.
Best,
E