Getting a new interface, probably a Saffire Pro 24...

[ballstix]

I'm wondering if the DSP version is worth the extra $100. Are the built-in compression/eq any more useful than regular VSTs? And I doubt anyone's gonna be able to comment on the Virtual Reference Monitoring, but I DO sometimes need to use headphones while mixing; the Sound on Sound review said it was useful, but it seems a little too gimmicky imo.