I would go for vk-31 at $2100 currently for sale at agon. I think it is an excellent price.
I had been thinking of getting vk-3i/3ix/30 for a while, and ended up with vk-30. I wish I could pull out more $$$ to get vk-31, but I thought that my vk-200 would not be able to tell much difference between 30 and 31. My sources are not balanced, so I preferred vk-30 to vk-5i.
I see 3i < 30 < 3ix,5i < 31 in their price.
I had been thinking of getting vk-3i/3ix/30 for a while, and ended up with vk-30. I wish I could pull out more $$$ to get vk-31, but I thought that my vk-200 would not be able to tell much difference between 30 and 31. My sources are not balanced, so I preferred vk-30 to vk-5i.
I see 3i < 30 < 3ix,5i < 31 in their price.