Well, before I give my advice best to hear what situations you drive in, as I suggest you have a CD to tackle:
1. A Z4 hoon...
2. Slow speed cruise in town/local area - daytime
3. Slow speed cruise (not curb crawl) in town/local area - nighttime
4. Stuck in a traffic jam - songs u can sing your heart out to that u can lower yr windows & let everyone else join in...
5. Bad mood fixer - after a shite day at work or someone's miffed you off, something to get it off yr chest
6. The chic seducer, something romantic that alleges u have a bit of culture just make sure u know which CD number it is rather than have the Prodigy funk their stuff
7. Something for ar&e twitching, foot stomping & head chickening to help you get from A-B
.... or do you have other drive types to address?