Topic: Recomendation to use TotalMix for Mixing, Summing and Mastering

Hello all
This is my question looking for someone to get clear my mind about this setup
I begun to use Pro Tools 10 few days ago with BF and i like to routing the Bus to each channel of totalmix and then the master bus of BF to a real compressor and back again to IN 1-2 on BF I'm using it as summing and i like it. But I'm looking to have more outs from totalmix around 8 more outs so i have to change the BF i guess to buy another interface with more outs.

Can somebody recommend me a good model to replace the baby face to get more outs from totalmix or any idea? I'm mixing ITB

Thank you very much!