Easy question. the only advantages aluminum has over copper are:
1: aluminum is more pliable.
2: aluminum is less expensive.
3: aluminum lighter.
The last advantage doesn't really matter much because of the relatively small volume of material used in any application.
so if Afro-engineering is your cup-o-tea, go aluminum.
Do it right, go copper.
What something ridiculously expensive that makes heads turn but works amazingly, SILVER! but then again good luck getting people to believe your VC's are solid silver. //content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif
ummmmm copper!