I was debating between going on a long vacation or getting the ADR's 18". I made the obvious choice and now I'm very glad I did, having a nice car is like the vacation that never ends (until some bozo smashes into you).
And about what you said, that thing about driving being the most pleasureful thing you can do...well I'm sure most people here can relate. I know one thing: driving my Z can be very theraputical for me on a bad day.