The one thing that is central to computer recording and that I have wrestled with is analog/digital (A/D) conversion. All A/D is not the same. Apogee, for example, has the
MiniMe. Very nice. For me, too expensive, even though it is represented as being superb at A/D (the mic pres don't suck either). On the other end of the spectrum (to compare apples to apples) look at the
dbx 376. Like the Apogee, it is a mic pre that performs A/D conversion, but after reading a post by a dbx employee slamming the box I wouldn't pick it up on ebay for fifty bucks... rather buy a nice steak dinner.
For me the RME Multiface is a excellent compromise. I have a high level of confidence in the RME Hammerfall A/D technology, and the Multiface gives me the functionality that I need, including MIDI. When coupled with
the RME QuadMic 4 channel mic pre I am spending as much as I would spend on
a MiniMe with more functionality and equally excellent A/D conversion. And I WANT that high level of A/D conversion as it is essential to taking me where I want to go.
Computer sound manipulation is absolutely the future. The high end ADAT recording solutions are essentially dedicated computers. If you don't pay for a certain level of quality, then you won't go with the computer solution as the sound, for justifiable reasons, will suck.
In the end, each must decide for himself, but if explaining my reasoning helps, cool.