Solid Pine vs Plywood cabs? Open Back or Closed Back?

A great article from Dave Hunter in Guitar Player:

"There’s an inf-byte popularly quoted lately that seeks to remind guitar obsessives that their amplifiers are responsible for 50 percent of their tone. Brake down that figure, and it puts the humble speaker cabinet behind a considerable chunk of the bottom line. And I’m... (follow link to continue)

http://www.guitarplayer.com/article/paul-mccartney-by/jan-00/6598