I think these are going to be my next upgrade

At what price point would you consider ciem over universals?

Is it possible to ever get sick of the hd650s haha?

I will mainly use a Zune HD while traveling and what not, but I am going to be building a computer and I will most likely add a nice sound card if needed.

I have KRK 8400s and they are nice and all but I'm looking for an upgrade. Max will be $400 for everything. If it wouldn't be a noticeable difference in quality then I will not bother with an upgrade. Or I can just buy an amp as I do not already have one. I listen to everything including a lot...