Which Virtual Machine to Use for Win under Mac OS X

I have been testing VMware and Parallels and from my limited experience so far here are some tips: 1) use Bootcamp if possible and just boot in Windows; I rather use one or the other and so far I have been still (conservatively) using WIN but I am migrating slowly; Leopard is such a great OS!! 2) if #1 is not possible go for VMware; advantages: faster and more reliable; More updates...soon.