Both seem reasonable matches to either amp.
I'm partial to the OHMs and the sound of omnis which tend to have a more life like presentation to me. Also I like that the OHMs use a single wide range driver up to 7Khz or so which is great for overall musical coherency.
I'm less familiar with the Vandy sound. I would expect very good results from these as well but more like conventional 3-way speakers albeit open-baffle which might tend to take the presentation somewhere more in between conventional box designs and omnis.
I'm partial to the OHMs and the sound of omnis which tend to have a more life like presentation to me. Also I like that the OHMs use a single wide range driver up to 7Khz or so which is great for overall musical coherency.
I'm less familiar with the Vandy sound. I would expect very good results from these as well but more like conventional 3-way speakers albeit open-baffle which might tend to take the presentation somewhere more in between conventional box designs and omnis.