I do not have any experience with the Shun, but for a lesser price I would be inclined to get the MAC, Tojiro, or Fujiwara...in fact I bought all three
Of the Tojiro and Fujiwara: The Tojiro is heavier and clad (VG-10 wrapped in a second layer of steel) vs the lighter monosteel Fujiwara. One is not better, just the main difference I see.
The MAC is pretty similar to the above two, but has a fairly utilitarian aesthetic, ie no bolster. I understand the MAC steel is less highly though of than the other two, but I haven't seen much difference in home use.
The Kohetsu Mark mentioned is on another plane. The steel takes a finer edge and has a killer grind. The only issue to bear in mind is the Kohetsu is a carbon steel edge with stainless cladding, so the edge requires a bit more TLC.