What I suggest is do what me and miata have done, and get good HIDs for the lows (morimotos are damn good, its what i have) and leave the high beams with regular halogen bulbs in them because HIDs have a warm up time which wont be good for high beam use. Plus HIDs shouldn't be flicked on and off fast, you'll kill the balasts, and damage the bulbs too.

I put LEDs in all the side marker lights, license plate lights(led fixtures as direct replacement), and front parking lights in the headlight "eyebrows".

I also run green LEDs in my interior dome and trunk lights, for added awesomeness, as well as my glove box compartment.