Some links

For John MacArthur messages try "The Bororean". One I'd highly recommend is God's Will.

Some other links:
Pastors.com
Journeyon.net
Sermon central
Outreach.com
VisionForumMinistries

Just as a disclaimer, I may not agree with everything on any website that I link to so if you don't agree, nor like something I may be in agreement with you...or I may not!