For an exhaust, i would recommend looking into either the Perrin, Cobb or the SPT exhaust. Nice tone and they look similar to stock so you don't have that giant fart can sticking out the back. Best thing to do is search around and see what exhausts other people are running. I have the STi one on my bugeye and love the sound of it.
As for HID's: don't do it. Especially purple. The housing for the bugeye headlights is not suitable to support HID lighting. All you will do is throw light, decrease you're nighttime vision, and blind oncomming cards. To safely run HID's you need either legitimate JDM headlights or retrofit with a proper projector. Go to nasioc.com and search for bugeye lighting bliss. there is a lot of good info on how to improve the the lighting on the bugeyes