I've also been looking at numerous warranties, though that 1sourceautowarranty place also has a few complaints, here are some links I found:
http://consumeraffairs.com/auto_warranty/1source.html
http://www.complaints.com/directory/2004/july/20/22.htm
http://www.usenetcars.com/archive/in.../t-191012.html
they are also currently *NOT* a member of the BBB (just checked today).
I've been checking out autowarrantybroker.com
$1,705 for 36 months via their web site, not sure if I really need an aftermarket warranty yet