Will This Work?, analog tape remastering to CD Options

I've been reading these posts fro soem tiem now and finally am ready to get into some real recording with my Mac. I have a Tascam 424 recorder, and am about to purchase the tascam US-122. II play in a working band and what I am trying to accomplish is to take our analog 4-track tape, remaster it in the Mac and burn it off on CD. I'm usign a dual G4 (1gig) and running OS10.2.8. The US-122 is bundled with Cubasis and something else. I do mnot plan to add alot of extra stuff to the original tape as this will be used mostly for sales demo purposes. What I want to know is "Am I on the rigth track here?" Guess I want a little assurance before I spend the money for the US-122.

Thnx,