I am looking to buy a new Dell Studio laptop and am unsure of the processor.?

It comes standard with an Intel Pentium Dual Core T4300 (2.1GHz/800Mhz FSB/1MB cache). But can upgrade to either an Intel Core 2 Duo T6600 (2.2GHz/800Mhz FSB/2MB cache) or an Intel Core 2 Duo P8700 (2.53GHz/1066Mhz FSB/3MB cache) I will mainly be using it for web surfing and email, but also use it for movies, games or videos. Which would be the better processor?