Best Choice for using Grid K1 cards on xenserver 6.5 sp1 and xenapp7.6?

Hello, i would like to know what is the best way for K1 usage on xenserver / xenapp 7.6
here is the situation:
we have a xenserver 6.5 SP1 host with only 4 2008R vm’s running Xenapp 7.6

what is the best way to deliver high performance graphics to the users?
should is use pass-through to connect 1 gpu to each vm?
or is it better te assign vgpu’s to the vm’s?
and when it is better to use vgpu’s, wich one should i choose?

Thanks,

Johnny

With K1, I’d always opt for passthrough when using XenApp.

Jason, thanks For your answer, i will follow up your advice.