Gd1 with l13a1 my little angel. WAnt to swap the engine
 

https://cimg9.ibsrv.net/gimg/www.fit...b4e407d83.jpeg
https://cimg0.ibsrv.net/gimg/www.fit...ee4a667d3.jpeg
https://cimg1.ibsrv.net/gimg/www.fit...a673d9659.jpeg
https://cimg4.ibsrv.net/gimg/www.fit...8a1d594e0.jpeg
My baby is jdm model with a l13a1 engine in it and its kinda small and not so powerful i need an advise from people who know what their doing.
i want to put a k20a3 or k20a2 or k20z4 but its kinda expensive and not so legal in my country. So i was thinking maybe to put a smaller engine so it will look kinda the same maybe not same hp but it will work so i thought to put a b18 under my hood. Im still thinking about it.
or the third option is to buy a new l13a1 or l15d1 and to make it stronger and with time to build in a turbo.
I need your advise guys whitch engine is gonna be best for my fit 06 gd1 jdm fitment?