Going from the x250.5 to the xa60.8, I'm sure some of the differences I noticed are indicative of going from x to xa and not necessarily just the .8 series. All I know is I love the xa60.8
My first thought when listening to the xa60.8 was "VOCALS!" Wow, the difference in vocals is huge. It sounds like the singers are in the room with me. Once I got past that, I realized that it sounded like everyone was in the room with me. Everything just seems so much closer and more detailed, even at lower listening levels. Great soundstage, and bass that is as tight or even tighter than my x250.5. I guess this is the unexpected part. The x.5 series is supposed to have tighter bass than the xa, right? The bass on the xa.8 seems as tight or tighter than the x.5.
I have noticed that I have to turn the volume up a bit more. Where the volume might have been at -20 with my x250.5, it's around -16 with the xa60.8.
speakers are Von Schweikert Unifield 3