Topic: Expanding my Multiface 2

Hi,

If anyone can offer me some advice I'd be grateful.

I currently have the Multiface 2 and I've started building a rack of outboard gear, compressors etc, but now I'm running out of analog I/O.

I'd like suggestions on the best way to expand my I/O for use with my equipment, all of which is analog (various compressors, mic pres etc)
I've currently got a select couple of pieces connected via the analog I/O so that i can use them as inserts in cubase, as well as dedicated channels for the mic pres, but i'm at a loss trying to figure out how to get more analog channels.

Anyone care to share some ideas? Would it be best to get a DAC, or another multiface?

Thanks