I need help with a swap into my 91 CRX DX

I have been thinking about swapping in a B16A Vtec into my 91 CRX DX but I have a few questions for people.

- Would a B16A fit in a 91 CRX DX

- Would that be the best engine for my money to add some horsepower to my car (I am only looking to make it a little faster, but they don't make turbo's for the 91 DX so an Engine swap is all I can think of).

- If I put a B16A in the 91 DX what other parts need to be changed to make it a smooth MOD? (ie. Trans, ECU, Wiring, Motor Mounts, etc)

- Can you please put any additional info on this or anyother procedure you think would work for what I am trying to do.

I currently have a D15B2 in the REX, but its giving me some horsepower problems.

So do you guys suggest a swap to the B16A or just to the D16A6 from the 91 CRX si?

How easy would the D16A6 swap be?

Any help would be great as I am just starting to get into my car and any and all help would be fantastic!

Thanks in Advance