IMO, I would stick with your plan, plenum and throttle body. I'm doing the same thing for my car this winter and made that decision according to my budget as well as tons of research. I made a plan for my car instead of sporadic purchases.
I'm going with the accufab combo. Out of all of em, I've heard the best responses and remarks about the acufabs. Although they are slightly more than the other kits including the dragon, hey, you get what you pay for. I plan on keeping my car for a long time and I never want to say, "man, shoulda spent that extra 100 bucks". I've done that before and it suks...
Good luck bud!