A better place to get a rack from would be:-
www.millennium-music.biz
These guys have been making customised computers for pro audio for ten years and kick the ass off turnkey and digital village. They can also make solid recomendations on soundcards. Though in all honesty, they, like alot of people, will struggle to tell you about any conflicts between the cards and specific HCPC software. Because these cards are all from a pro audio world.
Spicer, if you've got a problem with the breakout box, why don't you consider an Echo Mia. This does'nt have multiple analogue outs, so you'd have to do some external processing, but then nor does the audiophile, that you were considering, have multiple analogue outs. Brankxx is right with regards to the Echo's being better than the M audio's. This is due to the on board DSP. I'm still not convinced they are better than the RME's though.