[Schokolade bar]

I wanted to know if my current setup would be improved by changing the gear to some common stacks I've seen on the forum. I am using the HD650, UM3x, and K702 mostly on my current setup and find the K702s lacking some power from the Arrow, which is problematic considering that they are probably my favorite headphones. I just sold off my valhalla and bifrost because I wasn't to thrilled with the Valhalla and my HD650s (didn't even try it with the K702.) I have my eye on the HA 160 primarily but I'm wanting reassurance to justify the 500$+ pricetag, when my Arrow seems to be doing excellent with all my cans except for my K702s. My source is a HifiMan 602, and my desktop with ASIO. 
 
Thanks for the help!