Steffi Graf once said "Power is nothing without control"
I would personally try and do some suspension mods before doing anymore engine mods. Save the $$$ and do a engine and tranny swap and get rid of the slush box. Unless of course you can find someone to make that slush box into a sequential shifter then by all means keep it.
I am perfectly happy with the 145 ponies my 94 EX puts out. I might do an engine swap but cornering ability is of far more importance to me right now.