What B should I go for?

Hey guys so I keep changing my mind on plans for my hatch. Right now I am looking at swaping in a B series instead of rebuilding my D15z1. Question is what one I have looked at spec sheets and still not sure what route. I heard that the B16's have no torque so I am kinda leaning to a B18. I know that the B18c1 is decent and I have seen them for sale localy in my price range. I plan on going through the engine and puting new internals in it. I haven't really researched the B20 to much.
I have been reading lots of turbo builds and its been making me think of doing a turbo B18.
Anyways just wondering what motor tranny you all would do?
I have been reading lots of turbo builds and its been making me think of doing a turbo B18.
Anyways just wondering what motor tranny you all would do?