Budget USB DAC


I'm looking for a budget USB DAC. Does anyone have any experience with Diyeden, Fubar II, or Keces? Are these worth looking at?

All I need is the USB port, and RCA outputs like the Scott Nixon and Wavelength units have. I can't afford that price range though.
scramman
Once again - The Fubar II comes with a wall-wart power supply. It is not bus powered. The upgraded "Supplier" power supply improves the performance of the Fubar II.
FOLLOWUP:
I have used a stereo link, a fubar with power supply and an m=hdt paradesa. I like them all. If budget allows, id start with the fubar and work up....

I think hagtech sells a usb dac for cheap as a kit if you can build it...
The Hagerman DAC USB DAC, the Chime is pretty expensive, so I think Kbuzz is refering to the HagUSB, which is similar to the "Thingy" mentioned by Jwmazur and converts a USB signal into a digital signal that can be input to a DAC. In the case of the HagUSB, RCA Coax and AES/EBU outputs are available. Both devices still require a DAC.

I have a few systems and one uses a HagUSB into a Slimdevices Transporter's RCA Coax digital input.
The Blue Circle Thingee is on back order too. Just like the Stereo Link. Angela from BC linked me to a dealer in IL.

I've checked the Hagerman web site before. Forgot to mention them. I've built kits before Kbuzz .. a Dynaco 410 amp. No problem soldering but it has been a while.
But I would still like to point out that the Hagerman and Blue Circle just convert the USB sugnal to a digital signal. You still need something to convert the digital to analog. The Stereo-link does the whole trick.

Also, cruise head-fi. There is a lot of info there on less expensive DACs.