All kidding aside, your options are fairly limited, especially due to your cars slush-box tranny.

At the very least, you'ld need do a 5spd swap, but you would still end up with an underpowered NA SR20DE. You could then turbo it, but thats no simple task on the naturally high compression SR.

Honestly, nothing short of a full drive-train swap will net you the results you seek. Are you really prepared to spend upwards of 3K+ on this car to make it somewhat fast?

You asked for opinions, and you got mine, sorry if it wasn't what you wanted to hear.