My thoughts are similar to Todd's.
I have the same color exterior on my 987 and am pretty anal retentive about keeping it looking sharp (although not at Perfectlap's level). It received a $750 Permaplate treatment from the dealer prior to delivery, which I purchased in a moment of weakness during the negotiations.
Hindsight being 20/20, in retrospect, I would have done the following:
Forget the dealer treatment
Wash the car like a fiend.
Slap two coats of Rejex on the car (available online -
http://www.corrosionx.com/rejex.html or in some stores and used by many Porsche owners)
Never worry about it again (until you Rejex it in another 6 months or more).
Subsequent washings can be followed by a little instant-detailer application if you're feeling ambitious.
I took a meandering path to the above end-result, and screwed around with fancy polishes etc. The car never looked better at any point in it's life until after I did the above (15K miles later).
One more note, be extremely careful what kind of towels you use to dry and polish the car with, Just like Perfectlap tells us. Most imperfections in my paint were from using the 'wrong' towels for a period.