Post here some of your fav and hated vendors I'm compiling a list for reference.
Do your homework...
www.buy.com - electronics reviews
www.millionbuy.com - a great site to do some price comparison
www.carreview.com - reviews on anything from audio to performance parts
www.abtelectronics.com - very reputable, huge selection
www.ikesound.com - very reputable, great deals, lightening fast shipping, excellent customer service
www.thezeb.com - will beat almost any price, fast shipping, great customer service
www.mmxpress.com - very reputable
www.sounddomain.com - great customer service, huge selection, good deals
www.crutchfield.com - excellent customer service but higher prices than most other places
www.b-quiet.com - cheaper and comparable to dynamat, fast shipping, great customer service
www.partsexpress.com - great service, fast
www.buyloud.com - fast shipping, huge selection
www.sounddomain.com - great service and reliability
Stay away from...
www.competitionsound.com - piss poor customer service, slow a$$ shipping, many complaints.
www.discountave.com - customer service sucks, poor communication
www.cyberautosound.com - poor service