These five companies -- one of which is near and dear to the Oracle of Omaha's heart -- stand out for all the right reasons.

Diversification ranks among the most important components of many investment strategies. However, one of the world's greatest investors isn't gung ho about the idea. Warren Buffett once said, "Diversification is protection against ignorance.

Given the financial environment in which cash is sometimes considered as useless, Warren Buffett's approach of keeping large cash reserves stands out and generates investor interest and speculation. Renowned for his sharp investing style,