I have seen the Velleman pcsgu250 with its claims of Bode plots to 1mHz for some time and asked about experiences on a number of forums with no response. I finally sent $150 to newegg last year and procured one. Flash forward several months and i took some time to rewrite my excel macro's to import the data and I must say I am quite happy with the results. Sure it is no Audio Precision but it is a million times better than manually entering 100 sets of coordinates per trace on the test bench.
Integrate For Stereo - Why all amps on one chassis may be better. http://www.itishifi.com