Within the financial sector, there are banks, insurance companies, REITs, and more, but which area holds the most opportunity for long-term investors?

In this segment of The Motley Fool's financials-focused show, Where the Money Is, banking analysts Matt Koppenheffer and David Hanson rank their five favorite areas of the financial sector and tell investors why they think ACE (CB 0.86%) and Platinum Underwriters (NYSE: PTP) could be great opportunities.