The good side of owning a 240sx (S14) is that
-It's lightweight rwd, which translate to fun
-It can be built for drag, drift, autoxing (my personal favorites)
-Decent handling
-Seating position is a lil sporty
The bad sid of owning a 240sx (S14) is that
-Aftermarket support isn't as strong as the integras
-Things always either leak or break (not all, but most)
-Gas milage isnt as good as the integra
-Small interior space
Overall id go with a S14. Ive never owned a integra, but drove them many times, and had friends who owned them. They told me they prefer S14 over integras. You don't need alot power to have fun with this car. The standard KA motor will do just fine. Don't go with a RB. You're limited in parts if things brake down. If you want torque, go with a KADET, or just put in a LS1 like matt chin