No tweaking???
Check out this site [link|http://www.macosxhints.com/|http://www.macosxhints.com/] and tell me what you think...
Not much is required but some tweaking is a good thing...
I'm a step ahead of you though. Been Maccing for many a year now and not looking back. Still have Linux on my intel boxen though...
And since I have been scarce around here, let me take this opportunity to tell you that I am half way certifiable (passed the Solaris Sys Admin I test...) Hope all is well with you.