blkboxster

I already bought my carbon fiber shifter, should arrive 2morrow, And i have some more money to spend so which of the follwing should i get? maybe choose 1 or 2.

Carbon fiber consule can get one on ebay for $325.(how hard is it to change)
Rear diffuiser
clear headlights
cayman style spoiler?

thats about all i can think about?

thanks