Even if Buffett doesn't invest in these two companies, you might want to consider doing so.Warren Buffett doesn't need anyone to advise him on what to do. But with Berkshire Hathaway's (BRK.A 0.41%) (BRK.B 0.47%) cash stockpile now at nearly $277 billion, it's hard not to speculate about what the legendary investor might do with so much money. If I managed Berkshire's investment portfolio, I know what I'd do with part of that massive treasure chest. Here are two perfect companies for Buffett to buy next.An ...