You are correct that you will take a huge tax hit if you simply withdraw the money. I rolled about 60% of mine into a self directed IRA after 59 1/2 and haven't regretted it in the least. I'm retiring next month and will do the same with the remaining money in the 401k.
You might want to check the new thread asking CM recommended financial advisors thread and/or ask questions yourself.

I have been waiting with teeth clinched for several years, for that moment when I can get hold of my 401(k) without the 10% early withdrawal penalty. That moment comes in mid December when I turn 59 1/2. Questions:
1) Should I be in a panic to cash in before the end of the year, with new tax laws coming into effect in 2013 ? I know that's a rather amorphous question because we may not know what those are going to be until December thanks to election year grandstanding and general gridlock with our political heroes. I am not at all sure I could even pull it off with only a few weeks left in 2012 anyway, but still I ponder this point.
2) With question 1) out of the way, if I take it all out at once (let's just say its a LARGE amount), its likely to put me into a higher tax bracket and I will get massacred in taxes. Am I right ? In uncertain times I know there are those who would say take the money (all of it) and run. Yeah, I get that, but part of me says "Whoa! The wise thing to do is only take a certain percentage each year, whatever it takes to stay within my current tax bracket, to minimize taxes."
3) Or should I just convert it all to a self directed IRA so I can at least control the investments, and perhaps cash out a bit at a time from there ?
I am really in the dark as to the tax implications of all this, perhaps I need to hire an advisor...
Any and all input greatly appreciated !