I got one of these for Christmas, and have been loving it ever since... two channel oscilloscope, Arbitary Waveform Generator, Spectrum Analyzer, 16ch Logic Analyzer, programmable clocks... the thing has everthing I could ever want. For $500, it's not quite what this post was looking for, but it's a little more than just an oscilloscope.
http://dynoninstruments.com/index.html
Sparks