How much power are you shooting for?
Figure out your power goal and build to that.
I'm sending my block out to golden eagle (mon or tues) to have it sleeved ($759) and I already have my eagle rods and weisco pistons ($799).
Those are the parts I'm going with, they seem the best for the price.

With a s/c your going to be generating a lot of heat, are you or do you plan to run an aftercooler or water injection?
I don't even know the efficiency range of superchargers pumping 18psi...Would that be a custom pulley or do thay make one already?

Your going to eat up your budget real fast...it's easy to do...
I would recomend at least 550cc injectors
255lph fuel pump,
I know with turbo's gs-r cams are good and ITR cams are better, so I would imagine since s/c is just another form of forced induction you should see simular results....then again the power bands are totally different (sc vs turbo)...Maybe check around a bit, see what other people are running in their s/c b18c's....I know turbo cams are not favored very much with turbo's (strangly enough)