I'm still considering a 2011 WRX and I had talked myself all the way up to Limited/STi Base territory because I like having HIDs. My car has them now and I have grown very accustomed to them. However, I am not a fan of fog lamps, leather seats (in Vegas), or sunroofs, so it looks like the base model WRX would suit me best.
My question is in regards to retrofitting headlights though. Wiring issues aside, is there anything physically different from the 08+ STi headlights that might prevent retrofitting? Periodically I see 08+ STi headlights on Ebay so I'm just trying to pre-plan for how I might go about installing them if I get the car.