I started last year and the advice i got was to get the best equipment possible since if you buy some garbage equipment, you will end up replacing it in a year. Here's what i got for the important stuff:
Mask: Wilson dyna-lite
Chest Protector: Wilson MLU
Shin guards: Wilson leg guards
Plate Shoes: Tanel 360
Here's a brochure from the official supplier of Pennsylvania (.pdf format). You can order by mail, call, or email your order since i dont think you'll be able to stop in the store. Baseball starts on pg 16 and they have a great discount for starter packages.
http://www.piaa.org/Officials/POSmer...06Brochure.pdf