depends on the budget. if you dont wanna do the whole engine swap thing, build up the 4g93 but do it once and do it right. im happy with the 2L, but previously my 1.8 was pulling pretty damn good and was all nearly stock.
i dunno too much about 93T part prices, but just try ring meek 0417255377 see what his prices are like, and if any good compared to local sources, ask how much shipping is, otherwise no idea bout melb.