all those mods will void your NCW, well as far as any engine or driveline claims go

go for an ecu reflash, the only reason i have a piggy back computer (unichip) is that i currently can't get a verso done, if you can for your model i'd go for that (piggyback ecu's only trick the stock ecu to dump more fuel in & raise boost levels - much safer with an ecu re-flash)

don't waste your time with a s/s dump if you only want s/s because it looks pretty, the shineyness will dissappear as soon as you give it a blast leaving you with bluish/brownish/yellowish dump pipe

maybe get a wlabro fuel pump, but not really neccessary for stock turbo & injectors on such a new car

whiteline swaybars will give your more bang for buck than strut braces, don't forget end links too

forgoet the electronic boost controller, you won't need with a reflash