Having burned through a number of consumer grade laptops in recent years, I'm wondering if the additional cost of a business grade computer is a worth while investment.

I'm considering getting a laptop with slightly lower specs to justify the added cost. The primary benefits I see are: (i) the notebook will be more reliable, (ii) have a longer life and (iii) the warranty (parts and labor) will be 3 years instead of 1 year.

Are there any other considerations one should keep in mind when shopping for a business grade PC? Is purchasing direct from the manufacturer wise or are there other options that should be considered too?

Thanks in advance!