this is wat we are doing to mine at the moment
1. i made a custom wiring harness (to hide all wiring, relays and fuses)
2. engine covers in carbon fibre
3. all hoses/lines replaced with braided ones
4. every nut, bolt, washer, bracket etc chromed
basically i took wat we did with this S2000 and did the same to my engine bay
i dont know how far u wanna strip ur engine bay
but if u neaten up all your hoses and wires
paint ur engine covers same colour as your car
polish ur intake plenum, other piping and strut brace
throw in some braided lines
get a nice partition for your air filters and polish it
i could go on forever but it all depends on how far u wanna take it