Full conversion 320i 2009

hi. new here been reading up a lot, posting first time

i know this been covered a lot over probably a million posts. but i would reaaly like the pro's to help a man out here... where in durban can i do the full thing on this car with regards to exhaust system? and is it really really worth the chipping or not and which chip? or only mapping ?
ps..120000kms, out of plan.

thanks any suggestion greatly appreciated!