Updated from 6:57 a.m.EDTThe perfect setup for a stock in my mind? Insiders buying shares, the company buying back stock and a super-investor such as Warren Buffett also accumulating a position. If I can get three out of three, I'm in heaven, but even two out of three makes me happy, particularly if the stock is cheap in other ways as well. This is why each week at Stockpickr we update the Top 10 Insider Purchases and Buybacks portfolio, featuring stocks that have seen either big insider purchases or newly announced buybacks, as well as super-investors accumulating shares. This week's portfolio includes Red Hat ( RHT), Foundation Coal ( FCL) and Microsoft ( MSFT). To read more, visit Stockpickr.com.