+ 1. I also prefer Accufab and have had good results with a 75MM Plenum and 75MM Throttle Body. Another good brand to look at is C&L.
Here are some plenums to look at: http://www.newyorkmustangs.com/parts/mustang-intake-plenums
Here are some Throttle Bodies...
I've been running MAC Long Tubes on my car since 2003 and I got them 2nd hand. They have lasted and are high quality, but 7 years later it's time for a new set. I'm picking up a set of American Racing Headers soon and not looking back.