Both work for me, but the non-www is NOT redirected, the site just loads for both.
For my sites that I redirect to www, I do NOT use the !^www - I just do this:
Code:
RewriteCond %{HTTP_HOST} ^germanshepherd-breed\.(org|com|info)
RewriteRule (.*) http://www.germanshepherd-breed.org/$1 [R=301,L]