Normally people go for smoked headlights or you could go for some nice black angel eyes, then smoked ultra rears, nice set of rims them drop it. That'll get you a nice looking car. Then personally i'd go for a dimma grille, and colour code the bumpers etc, work on the paint work go get it looking super shiny then you'd be pretty much sorted i think.
Then could go for backbox and maybe light smoke tints if you wanted to. Would probs set you back £600+ depending on what you get and where you get it from

Egay is pretty good for things like lights etc