I play stuff like metallica and avenged sevenfold and i play rythm and some leads. Im lookin at the seymour duncan jb sh-4, and seymour duncan invader sh-8......which one would be the best for a good heavy metal sound with chunky rythm and screaming leads?
Depends on if you want actives or passives.

If active, I'd say Seymour Duncan Blackouts. Better than EMGs, great for metal, and a decent price.

If passive, maybe the D Activators by Dimarzio. The SD Invader is a pretty good choice as well. Whatever floats your boat between those two.
Dimarzio X2N and PAF Joe combo OR Dimarzio D-Activator X Set.
ESP Vintage 4
Fender American Special Jazz
Fender American Deluxe Precision
Ibanez SR700
Jackson DXMG
Fender American Standard Telecaster
SWR Black Beauty
Orange Thunderverb 50

Modulus Quantum 5 fund-$2150/$3369