Depends on what's considered 'maximum' for the clock speed I suppose, but yes, I would...and do.
Modern CPU's and motherboards are very power considerate, even when heavily overclocked, by lowering voltage under light loads. And it will sleep entire cores when idle. Even if for just a few dozen mS at a time it adds up to keep the processor cool.
While typing out emails, light photo editing, watching videos and other light tasks when browsing the web, even with 10 or so tabs open in two or three or so FF windows, the fan stays barely above a whisper with processor temps hovering 5-10 degrees above ambient. Why not have the processing power on tap when I want it?
But talking about a NEW CPU adds a different dimension. Assuming the upgrade was significant on it's own at stock clocks there's something to be said for simply enjoying it for a while. Once it's showing some weakness and you feel you need a little bit more, only then go for the daily overclock to bring back it's lustre.