Trebles,
I'm not particularly the best person to answer your guestions. I went with an all-in-one unit. It made a lot of decisions moot. Do you have your board yet?
Why do you need so many outboard mic pres? The board has mic pres. I'm not familiar with the board, but the pres may very well be useable. How many tracks do you need to record simultaneously? Even if you were gonna track "live" you wouldn't need that many pres. Maybe an outboard or two for different colorations, such as on vocals.
If I were you I would post these questions in the "Computer Recording" forum and the "Rack" forum. If you haven't bought the board yet, you might consider an all-in-one DAW. It would be a simpler solution.
One thing I've learned as a newbie to recording, is that newbies labor too much over decisions. We labor and labor over trying to get the most pro-like set up, or the most bang for the buck, when we should just get something and start tracking. Don't get me wrong. I'm not saying we shouldn't make informed decisions, it's just that there comes a point when we just need to make a decision and go with it.
I don't know what your financial situation is. But if I were you, and it looked like it would be a while before I had the money to get set up, I would buy a multitrack cassette. That way you can be practicing and learning in the interim. Plus, you can always start acquiring some of the outboard gear you want and put it into use. You can sell the cassette later, when you save up the duckies to upgrade.
You can get a lot of good advice from guys on this board. But as I said, you might want to post them in the proper forums. Most people like to keep the subjects pretty close to the forum.
These are just a few of my thoughts. Feel free to use or discard them as you see fit.
Taylor
Taylor