Cups are good, 40mm drop is good, induction kit isn't worth it except for show and sound.
ICE is up to you...
Stealth shelf in the back with 6x9's will give you good noise to cost but in truth they'll disturb the operation of the sub. If you want just a little rear fill the rear speakers are 6x4 and JBLs fit straight in.
Best to sort out the front with nice components if you can. The standard door speakers are 13cm which is a bit weedy for a decent mid response, best bet is to buy or make custom door pockets to allow 17cm speakers.
Tweeters in the dash are 3.5" and Infinity ones fit in with a squeeze, JBL ones are too tight a fit.
For the sub there are some nice grommets in the passenger footwell to pop 12v cable through from the battery to the boot.
All depends how far you want to go with it really! It's been a while since I've done anything with my speakers so the numbers are from memory. I'm sure someone will correct me if I'm wrong!
