Wait a minute. How did I miss, in all 60-whatever glorious pages of this thread, that you didn't get yourself a wort chiller?! I mean, seriously, with all the other toys you bought so prematurely!!! I'm amazed that your chilling setup isn't, like, one immersion chiller in an ice bath running to a second immersion chiller in the kettle, and the wort being pumped out through a plate chiller and into a glycol-jacketed conical.
You can definitely do overnight chilling (I've been forced to do a batch or two like this myself, and had absolutely no issues). Just make sure you don't run your hot wort directly after the boil into a plastic or glass fermentor. That's a guaranteed disaster. It has to at least be chilled enough not to melt/temp shock your fermentor.