The high compression head will give you the most "bang" for the buck. An electronic or the Nu Rex centrifugal advance set up will eliminate the hassle of the advance lever. Depending on your location and the travel you want to do the Mitchell overdrive is an excellent choice. Since I've driven a Model A all my life I don't have a problem with the transmission being stock but you do have to get use to the shifting with out syncros.
You will get a lot of input about keeping it stock or making modifications. Like I said I've driven for over 50 years and make some trips of 6 or 7 thousand miles in the matter of 5 or 6 weeks, so I have experience about what works and doesn't on the Model A. Now besides the ones you listed you might want some creature comforts, my sedan in the picture has all the items you listed and a few you didn't. It has A/C, heated seats and a hidden stereo, oh yeah and cup holder!
