Best Buy warranty on M6805:
Here is the link:
http://www.bestbuy.com/site/olspage....174&cmp=%20%20
Click on the service plan button next to the price.
The extended warranty is state specific (since different states provide different levels of consumer protection - pity folks in the southern states since their legislatures have deemed business over consumers)

In California, the BB coverage follows EM's:
"* This Plan provides battery repair/replacement for notebook computers, cellular and PCS phones when original is determined defective by us.
...
* This Plan provides coverage for product failures due to dust, heat, humidity and normal wear and tear.
* Notebook Computer screens are covered, unless failure is due to accidental or intentional damage.
* This Plan provides pixel repair based upon manufacturer's guidelines."
It appears that the BB plan has some benefits over EM though much of the warranty tracks EM. However, I want to point out that BB makes no guaranty of new parts:
"Replacement parts will be new, rebuilt or non-original manufacturer's parts that perform to the factory specifications of the product at our option."

[sorry Element]
Likewise, it appears that the plan ceases after total replacement:
"* This Plan is fulfilled when a product is replaced after the expiration of the manufacturer's warranty."
Is it better than EM? Based upon these terms, I suspect the wear/tear provisions provide better coverage though the specific exclusions virtually swallow the rules. For example, screen replacement to due wear tear would be governed by EM's policy, not the general wear/tear provisions (specific warranty terms typically govern over general statements). So LCD pixel problems due to case flexing still requires use of the box - 3 pixel analysis before replacement.
Is it worth the cost differential? Depends entirely on risk assessment.
BTW, the battery replacement policy of BB appears identical to EM since BB uses their own procedure to approval replacement. They do offer a "conditioning" program though I suspect that merely means they run defrag while scanning your system for good pix and other "juicy" data.
Hope this helps.