Knowing what formats you will be working with will be essential to building a system and workflow. General rules about buying a system, buy as fast a system as you can afford at the time, this will keep the longevity of the system as high as possible (no matter it will be become obsolete in a couple years anyway).
Storage wise, one or two hard drives is not likely to cut it. You should look into RAID solutions. Cal Digit, and Maxx Digital make nice ones.
If you plan to do critical color correction, you should also look into a capture card. I recommend AJA’s products.
Regarding tech issues, Final Cut handles media quite differently from Avid, and it sounds like you could use a full professional consultation. That’s soon to come eventually from this post, that you might want to look into hiring a professional consultant to really get you up to speed.
Richard Sanchez
North Hollywood, CA
“We are the facilitators of our own creative evolution.” – Bill Hicks