1) change to new oil will not gain any performance, save the $$ and stick with what you're using and change oil frequently to extend engine life.
2) Front tinting is no fun, if you get caught at a road block, you will get VI for sure...
3) Ebay would be a good source:
08 Sedan -
http://cgi.ebay.com/ebaymotors/Genui...Q5fAccessories
08 Coupe -
http://cgi.ebay.com/ebaymotors/2006-...Q5fAccessories
4) Is your clutch slipping now? Don't upgrade the clutch unless you need replacement or making more power than stock because clutch will NOT make power
You can try Evolution in Maple Ridge, they have price on labour and good services