sounds like an awesome car, will be a weapon when done
The Link G4+ ecu will be hands down the best upgrade for your car, with a good tune youll get better fuel economy, idle control, cold start, more stable boost control etc etc.
You wont be able to make much more than 190kw on the stock 440cc injectors, I've gone to set 565cc sidefeeds out of a BP legacy (cost me $30 lol) which should give a you bit more headroom or decap. Fuel pump is recommended for safety but not essential, get a Walbro 255, theyre cheapish and work really well.
The VF28 turbo will be turning into a hairdryer above 200kw so as others said youll need a bigger top mount or a front mount to keep the air cool enough. You probably make 210kw+ on stock turbo & internal wastegate but a quality 38mm one will keep the boost stable. Stock bov is fine.
With the stock motor and turbo I wouldnt go much over 220wkw so youre not stressing either part too much. then if desired in the future, forge the motor, get a big turbo and go for 280+.