Having founded my video editing and video camera busines when analog was the only choice, the biggest difference out of the gate is the analog deck used for outputting your signal.
If you really have an important project, and you need the best possible analog quality, just e-mail me and I can discuss the low-cost/highest quality analog to digital services that I offer.
For low-budget projects where there is no budget, all I can say is start with the earliest generation version of your analog source and use a digital deck as the ee-ee convertor to fire-wire.
Good Luck.