The SAN Question

Do I ISCSI or Fiber Channel? What are you guys who are reading this who have SANs doing? I have worked with both technologies in my past. I am familiar with the challenges that come with Fiber Channel, but I love the speed. I have also worked with IScsi Sans... Seems easy, but the actual performance left something to be desired. However, this is a church and I want be running heavy transactional 500 GB databases (well until we grow some more)...

Please comment and leave your thoughts...