It's worth searching the forum for DG1032Z - there are a kit if threads discussing it and the DG1022Z. In one thread I recall, the author compared the two directly and the decided the 1032Z was a much better unit.
When you get into these AWGs, it's almost like you need a spreadsheet to compare features. Things like sampling rate, maximum frequency for sine waves, maximum frequency for everything else (usually MUCH lower), channels, output voltage, etc. They vary WIDELY.