If you consider Dynavector XV-1s, one consideration would be that ARC PH series has gain of only 58 dB. I think that is really a bit too low for XV-1s. I probably would use ARC PH series with cartridges with at least 0.4 mV. Some preamp sounds find when you crank up a bit more volume than usual but some preamp does not sound so good when volume has be cranked up high. I don't have any experience with Asthetix preamp so I don't know how that would go. For XV-1s, I would prefer something with at least 64-66 dB of gain or higher personally.
Regarding JMW arm, I used XV-1s with the full 10.5 arm for quite awhile and had very good result but XV-1s did sound somewhat better, may be different would be a better word with Graham arm but it was also a different turntable so who knows. However, the new one piece 3D printer VPI arm that is coming sounds very interesting and initially feedback sound promising so it might be something worth waiting for.
Regarding JMW arm, I used XV-1s with the full 10.5 arm for quite awhile and had very good result but XV-1s did sound somewhat better, may be different would be a better word with Graham arm but it was also a different turntable so who knows. However, the new one piece 3D printer VPI arm that is coming sounds very interesting and initially feedback sound promising so it might be something worth waiting for.