Looking for more KW out of my RB20DET

[HR31GT]

I have HR31 Pasage gt serIII, with eccs rb20det, auto, 3", big fmic, 2.5" cooler piping,hks air pod, just recently installed a boost controller and upped it to .9bar, and its a bit laggy but it hits at 3000rpm. Looking to get more go(especcially more torque and bottom end_as funny as that sounds) out of it and thinking of either getting my ecu remapped, put an rb25det turbo, or fmac. And also as I live in brisbane it would be good to know any workshops that dynotune and have much experience with rb20's any help would be appreciated. Any ideas guys as i'm sure we all go through same stages........