Reply to Multiple Audio 2 DJ on Windows

Hey all,

I want to get 4 outputs going to a mixer, and the solution I'm leaning towards is buying another Audio 2 DJ in addition to my current one, since all I need is outputs, and the alternative is spending $400 on an Audio 10. I know Mac users can aggregate multiple sound devices together into one, I'm wondering what the best solution is for a Windows user like myself? Has anybody done this with ASIO4ALL? What's the latency like as well?

Thanks!