For those of you thinking of taking the lunch box plunge and wanting to get into the high pre's, this is a no brainer. I too, in the beginning, just asked too many questions. I took the plunge last November and box an 8 slot OSA and Buzz Elixir (thanks Nathan). I have since filled it up with 3 A Designs and have the new GR on the way.
The money you save by doing it this way is incredible. For example, if you look at the new GR 500 compared to the stand alone unit, you save at least $400 on the power supply alone! Add this up by all of your pre's and you have enough to spend on more pres.
My point in this post really being, a big thank you to all of the manufacturers that allowed the little guy to get some big time gear.
Thanks again