Hi Chris,
What I really like about your system is the simplicity and clean look. The wood grain of your floor and speakers match nicely, and you don't have a lot of "stuff" all over the place. Looks like a nice room to kick back and listen to music. my cheapest recommendation for you would be to replace the wall outlet feeding your equipment with a high end model....an Oyaide or PS Audio's newest all copper one, or Jena Labs..Furutech...lots of them out there. The bang for the buck with a resolving system such as yours would pay off for you. The other thing I would do immediately is to unplug the Krell from the Panamax and plug it straight into the wall. I suspect this would give you immediate gain in sound quality. Are your speakers both the same distance from the side walls? It is hard to tell in the photo. VERY nice system there my friend, hope you get lots of listening enjoyment!