It is lazyness....just try typing the title of the post into google, and interestingly enough there are boards out there that meet their base specifications.
DSP board
with ADC
with DAC (optionally bipolar)
I just took a look at one of the google results and it fits all of these criteria, though I did not check if the DAC was bipolar as it wasn't specified as mandatory only perferred.
I'm also too lazy to direct the OP to the board I found, I'd rather put in as much effort answering their question as they put into asking their question.