Chip,
I was an early Alon customer, purchasing a pair of Alon IIs in 1993, prior to any of the reviews. I chose the IIs over the IV because they were a better fit in my smaller listening room. The IV is a little larger, and plays a little deeper. My room size is 15' x 18'.
Prior to the Alon II, I had Apogee Duettas and Vandersteen 2c speakers. For me, the Alons were keepers, and I listened to them ten years. When I changed speakers, it was primarily due to my desire to try something different.
For the price, these speakers are very, very good. Everyone, most importantly me, liked the speakers in my system. When I finally sold them, many friends remarked how much they enjoyed listening to music through the IIs.
Ten years ago, I listened primarily to rock. Now I listen mostly to classical (80%). They work well on both genres of music. Open baffle mid-range and sealed bass, too. I have better speakers now, but for the money, either of these is wonderful.
scott