Is an AFPR worth it, or should I just get the stuff to reprogram my computer? The computer would probably come shortly after the AFPR, but if that's the case, should I even get an AFPR?

 

Theoretically higher fuel pressure provides better atomization of the fuel so you get a better burn and a bit more power. On the other hand to really be able to take advantage of the change a prom would be a good idea. If you are buying a prom I'd do all the other changes first so that you can tell them what you have and not have to buy another one down the road (they're not cheap). If your burning your own chips you'll be constantly playing with them anyway so just burn new chips every time you make a change.