Obviously the power supply, dac, and SoundCheck mod all make incremental improvements. If money is an issue and you don't hear any clicking sounds through your speaker using the stock walwart, I would say hold off for now. Get a wireless adapter like the Netgear WNCE2001 and install SoundCheck's mod. I heard a big difference than stock SBT. When I upgraded to the Channel Island Audio power supply, it refined the music and added a smoothness but IMO not as big as SoundCheck's mod. I keep the screen on for my wife and the difference between having it on/off is not that big to my ears. There is a difference but not enough to annoy my wife.
I haven't heard the SBT using analog out since I already had a DAC so can't comment there.
I haven't heard the SBT using analog out since I already had a DAC so can't comment there.