Thinking of moving this blog to blogger.com or wordpress.com

Haven't decided yet, but here's a nice summary of the features involved in blogger.com vs wordpress.com.  I wonder if tumblr or posterous are more relevant now?  I've got a ton of this old stuff to port over.  Looks like I won't be able to show comments made by their rightful authors for old posts no matter which site I use.  Decisions decisions.