Pretty sure the Vipec is just a rebadged Ling G4
Do you have a Hypergear turbo? If so you can get the Adaptronic Plug in for around $1200 comes with internal 4 bar map sensor.
$44 for the air temp sensor which you can wire into the ecu loom so its quite neat(I have some spare pins if you need one)
Has a great auto tune function.
Also can have traction controll(You need to hook into the front wheel ABS sensors), launch control and Andy(The creator) has just demoed how anti lag works on the ECU.
Only down side i can see is it is wastespark and semi sequential injection, this didnt bother me too much.