The color space you set in the camera only affects the JPG, not the RAW. Ditto any contrast, sharpness, etc, camera settings (some camera companies can use "photo style" settings to process the RAW, however).
If you're only using the JPG for the Web or for prints from Walmart or other big box photofinisher, then use sRGB. If you are printing from an in-camera JPG on an inkjet at home, then use the aRGB camera setting.
Paul