DA Convertors

i'm looking for a DA convertor to give me extra outs from my studio pc

i'm currently using a yamaha dsp factory with the adat card fitted, it has 2 adat in and outs, one of the sets is routed to my 01v which i use for recording synths and that on to the pc and the other is spare, which i want to run into my mackie so i can make more use of my filters, fx and multiband.

i have found my self pressed for time and not been able to fire
everthing up to write tracks so i guess for now i will just work more within the pc

i was think of getting a Alesis Ai3, http://www.alesis.com/ai3 there is one on ebay i spied

anyone have any other choices for me