I splash in a different pond... Freescales' 9S08 series has a Bunch of candidates with multiple 10 bit ADCs and a serial port (USB may be available...).
The serial port would allow PC interface now, mgt by VBasic quite easily.
The learning curve won't be easy, but once accomplished, PICs will reset themselves into a new roll in your toolbox...
Assistance in the Freescale arena available (I'm neither employed by nor seek compensation for). However, if you want me to build it for you... that's different (it IS my day job). Good Hunting... <<<)))