I have been using Safari for quite awhile. I have Firefox installed for those web pages that seem to require it. I am interested in the little cottage industry of web browsers still out there, some of them very powerful. I'm not sure any are a clear choice for pastors/scholars... Firefox has so many plug-in options, there is great potential there. Macworld just released a very good survey of the Mac browser landscape called "The Browser Bunch". It includes sections on: Comparison charts
Web standards compliance
and suggestions on finding the right browser for you (pay or free)
It's a very well done article. It does conclude that for most folks, Safari is the best choice, with Firefox also with merits. (It seems I had gotten it right even before reading the article.)
Update: Or you can go old school.