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
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.
Riffer ... this is from the Blue Circle web site:

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The USB Thingee

No, it doesn't have a tube in it. The tube is just for a visual reference.

The "USB Thingee" allows you to plug into your computer to access music files, internet radio and even DVD.

It can be used with the internal 24 bit DAC and output via headphone or line level to your stereo. For maximum sound quality you can use an external DAC via SPDTF or AES/EBU output.

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It does have analog L/R RCA output jacks, and a headphone jack. Am I missing "maximum sound quality"?