That is a difficult question. I have heard the above mentioned products but not together. The Nelson Audio store in Guangzhou sells only their products. I did compare your unit to the Jolida 302 about 4 or 5 years ago in Beijing. I felt the Image 34 was a little more detailed than than the stock Jolida IMO but I knew that the Jolida could be modded to perform to a much higher level.
That along with the availability of schematics for the Jolida steered me to the 502. I also didn't know Nelson audio at the time and was worried about reliability. I went to the Guangzhou Hi-fi show in December and there was some nice stuff. I really like the Audiospace gear.
