u have so may options mate! CRD are the best, then theres the others such as unique, unigroup, hitman, advan, belgarage, rigoli..the list goes on..the cheapest u will get it done anywhere will be 500 and that will most likely be hitman in penrith. A tune netted me about 25rkws, but it really depends on how your ecu is performing atm. If its coping well with you mods, the gain will be less than somwhere whose ecu has hit R & R and is running bad afr's, timings out, etc, etc...ring around, but youll still be v happy with a tune, even if ur max power is'nt too much higher, as you will notice that your overall power, particualrly in ur midrange is a lot better.