Capitalizing and pluralizing official titles

Offices, titles, and positions such as president, king, emperor, pope, bishop, abbot, executive director are common nouns and therefore should be in lower case when used generically: Mitterrand was the French president or There were many presidents at the meeting. They are capitalized only in the following cases:

When followed by a person's name to form a title, i.e. when they can be considered to have become part of the name: President Nixon, not president Nixon
When a title is used to refer to a specific and obvious person as a substitute for their name, e.g. the Queen, not the queen, referring to Elizabeth II
When the correct formal title is treated as a proper name (e.g. King of France; it is correct to write Louis XVI was King of France but Louis XVI was the French king)

http://en.wikipedia.org/wiki/Wikipedia:Manual_of_Style/Capital_letters#Proper_names

Shouldn't it be, "OK, genius - good luck!" Or, "OK, genius. Good luck!"

Sorry, I couldn't resist. I do value your website greatly! Am I right about the comma after OK?

While I'm at it, where the heck do I put the question mark? Should it be like this: "...good luck!"?. But wait. I need another question mark:
Should it be like this: "...good luck!"??

Ha! Punctuation is funny!