Instant Brand Recognition
Easy to remember
Hard to forget
Speaks about the authority you brand / company commands in your industry
You also get a powerful e mail address
A huge number of Fortune 500 companies already own some of the best names
Virtual Real Estate is valuable and powerful
There are limited premium domains in the .com space
Single Word Generic dot com domain names are taken, but critical ones may be available for resale in your industry
Category killer domain names define their owners as a force in their industry