Help me spend my money

If you don't have any sort of room treatment-my vote this this is by far biggest bang for the buck. Bass Traps in the corners and absorbers/diffusors on first reflections a must...let us know what you do!

If you happen to live in Texas, I am about to post a pair of ASC Tower bass traps...

No on the usb cable. No on the converter for now. They become obsolete too fast. Realtraps are great but try before you buy to see if you need them and how many. The Caps server MAY be a great idea, but check out the Auralic Aries coming out soon. This may be a great way to enjoy your music ( or Spotify ) and you are already using the I pad interface and computer audio. A lot more hi rez music available as downloads and the Aries should play them all. We should know soon how well the Aries and Caps server get along. A lot of posts over on Computer Audiophile. I've checked out you system. Let's face it, your and Audiophile and a Music-phile. Best to admit the truth.

Pork belly futures. Write covered call options.

I change my vote. I just read your post about your impressions on demoing the light speed USB cable. since you love the improvement, I'd go there first, then get the room treatments.