<p>I have a bunch of perfmon files that have captured information over a period of time. Whats the best tool to crunch this information? Idealy I'd like to be able to see avg stats per hour for the object counters that have been monitored.</p>

Perhaps look into using
LogParser
.
It depends on how the info was logged (Perfmon doesn't lack flexibility)
If they're CSV you can even use the ODBC Text drivers and run queries against them!
(performance would be 'intriguing')
And here's the obligatory link to a
CodingHorror article
on the topic ;-)