Heh, I just bought a coffee grinder a couple of weeks ago and was doing the same research as you.
Baratza Maestro is the one that is most recommended. Good quality grind for drip and not that expensive.
I bought the Baratza Virtuoso for $60 when williams-sonoma was having a clearance sale on them. Might be able to find a good price on ebay. None of these are THAT quiet.
If you want really quiet, you can buy a hand grinder, the Hario Slim Mill and the Hario Skerton are very well regarded.