No single company I feel very strongly about an upside except Apple.... my 401K and my Kid's education savings are in mutual funds.
I was going to buy MSFT last year until I finally got to see how bad Office looked on Windows 8 for tablets and Microsoft convinced me that they really don't know how to change fast enough. My thought now is that Office won't be relevant enough by the time it is really good on tablets. But I seriously thought Microsoft stood a chance of unseating customers from Google in mobile if Windows 8 and Office for tablets was executed well -- neither were executed well so I did not buy their stock.
AMZN is over-priced and so is GOOG right now. NFLX may still be a good buy -- they seem to have learned form their mistakes and it seems that they are not done going up yet.
Facebook is kinda promising. I see Facebook Home as a trojan horse on Android. Every month Facebook is going to add features to draw people away from Google services and advertisements and into Facebook services and advertisements. It gives Facebook the opportunity to rely on Google services where they are lacking and then build replacement versions for their services. For example, Facebook can put a facade for "Search" on an Android phone that hit Facebook's Graph Search first and then fell back to Google search for more results. I think FB is worth more than $28 per share.
Disclaimer: Don't invest on what I say -- seek a financial expert. Investing is always risky and you could lose money.