hope this reply gets to you, been over a month. That's a great setup and it will perform very well for you. Personally, I'd go with the RCE black springs because they ride considerably smoother but the swift spec-R springs are designed specifically for that setup and will deliver superior handling if you don't mind the bumps. The d-specs are a top quality strut, better stuff than a lot of cheap coilovers are built around. They're perfect for our cars and a good upgrade over the STi strut.
2015 STi: Still Stock
04 STi, 04 WRX: SOLD