It's hard to argue against Bilstein shocks/struts for any Mustang, they're one of the best products on the market and one of the first things that should be done to a Mustang stock suspension.
As for springs, there are several great packages out there, depending on what you're looking for. The FRPP C Springs are great, as are the Eibach and H&R packages which are all about the same price. I am slightly biased towards the H&R springs only because I chose those for mine, and have had nothing but compliments on how it looks and rides. Spring Isolators are ultimately your choice, I prefer them as it seems to cut down on some of the metal on metal noise, at the minuscule expense of something so small like an 1/8" drop.
I'm also agreeing with what Flghtmstr1 said before, any 4-bolt caster camber adjustment plate system will work, but it's hard to beat Maximum Motorsports. They look great, are easy to work on, and the price is right. For what it's worth, we've got some great prices on all of those if you're interested, give us a call or PM and see what we can do for you.
-Patrick