Windows Auditing?

[Groundhog]

Anyone use any particularily solid auditing software for Windows (SP2 or later)? I'm looking for something that historically tracks basic file access (the opening as well as the modification of files), though I'd be very surprised if one of the specs the business has requested - tracking of the duration of a time a file is opened for - is at all feasable, given the variety of programs that can be used to open files.

There is a ton of stuff out there that looks like it fits the bill in regards to the majority of what I'm looking for, but it's always hard to sort the crap from the quality.