I currently have a b18c1 head and block in an EG. And i am planning to have major upgrades done to it, but i don't know which kind of upgrade to go for . Here are some current mods:

The Head is stock
Spoon CTR cams intake and exhaust
Spoon CTR pistons
Skunk2 intake manifold
JDM 4-1 Header
Apex VAFC
310cc injector
GSR fuel pump
STR fuel rail

Here are my choices to upgrade:

LS Crank
Eagle Connecting Rod
P30 Piston Over .25
New crank bearings
new head gasket

or

Bore 85mm
Sleeve
85mm JE piston 11:5 compression i think
New head gasket