As I have understood, in general:

Poor SMPS < Good SMPS < Simple LPS < Very Good SMPS, downstepers ~ simple Lin Regulated LPS < Shunt PSU ~ Super Regs

For some designs the list could be in different order. Usually oscillators need ultra clean dc up to MHz, for analog circuitry the ultra clean-ness should be up to few hundred kHz, and is subject to topology.

Personally I can vouch for shunt psu-s as these have been top performers in my equipment. Simple linear regulated psu will be among the cheapest solutions, but IC regulators can be limiting factor in some designs, like power amps or tube designs. SMPS-s are most efficient, but in audio this is generally last thing to worry about.

For amplifiers output z is debatable, but for psu the output z should be as low as possible in as extended freq range as possible. Shunt psu-s shine in this. Film and polymer caps as bypass and chokes will aid in this greatly too.

Wizards at National Semi seem to think metal cans sound better too during dev of their high fidelity opamps, they have no idea why either. Have a simple LPS on my EMU dac and there is a difference, measurably though it does not have enough PSRR to kick away power line crap when the exercise machine is in use.

Ifi has a universal audio grade SMPS wall wart that one can try out, I intent to get one for future uses.

One possibility: http://www.newark.com/sola-hevi-duty/sls-12-017t/power-supply-linear-12v-22-5w/dp/93K6597

Thank you for this. Very cheap on ebay as you said. But how would I hook this up as it doesn't appear to the normal circular DC12V hookup? I'm not opposed to some DIY I just am not knowledgable with power supplies and don't wanna zap myself or any gear.

I made a bunch of different cables with the correct connectors for different devices. For example, my sigma11 has a size n (5.5mm OD/2.5mmID) female connector. The TCC has a the size h (3.4mm OD/1.3mm ID). I also have the right cable to plug into other stuff like the E90 amp and Geek Pulse. Don't recall which sizes those were ATM.

Thx, just ordered the Kobiconn 3210-E    jack for this fucker.

If you are based in Europe:
http://www.audiophonics.fr/en/power-supply-kits-full-power-supply-c-617.html