I would take Brocks advice on Mods--at least for now (it ain't broke, so don't try to fix it)*. I did get the Channel Island power supply ($259); can't say that it made a big impact, but I think the Touch is at a level that it is a worthy upgrade. My SQB sounds fantastic. I run mine via coaxial to my DAC, the signal sent wireless. I'll give $1000 to anyone who can distinguish it from my CD transport 7 out of 10 attempts. (I'll give ya 3 "misses"). The key is the same with any system, a good DAC and good speakers. Enjoy!
*You should see the nearly endless thread of people on the SQB forum who end up with issues after doing those mods.