4AGE responds nice to FI correct? I honestly would not bother with this type swap due to the availability of M/S5X engines here in the US.
Six cylinders offer nice torque and will not be stressed as much as the four cylinder with a turbo and the heavier E36 compact vs a Corolla or ? What ever smaller Japanese car swap that this engine would swapped into.
RB26 would be fun for sheer grunt.
S14...10k core charge from BMW right now, trust me you don't want to go down that path.
Yes they are both mine. they both absorb $ like it goes out of style since it's a hand built car with NLA parts.