Best upgrades for me......
Dunlavy speakers, more like studio monitors but never harsh or shrill, can play them at reference (with 568.2 and Classe power amp) and the wife never says turn it down.
With my Lexicon MC8 and or the Kef speakers I would never get passed -15db on a film without her moaning!!
Also Crystalio for me too, I SDI modded my Sky+ at the same time and it transformed the picture, went from something that I was never happy with to something that blows me away at times. Using Panasonic 50PHD8 plasma. I was a Lumagen user up until that point, and although good it really doesn't compare.