Processor and Motherboards/Buses

This computer is an investment that one day I would like to help me make money. That being said price really isn't that big of an issue. The processor I choose is the Intel Core i7-870 w/vt (2.93Ghz 8mb L3 cache) I like this processor because of the large cache space this makes for a high performing computer. I don't pay much attention to the clock speed on processors because it sometimes makes the processor look slower than it really is. And to go along with all this cache space is a 4gb dual channel DDR3-SDRAM 1333mhz . I don't think this is too much I will be running some complicated applications and multiple ones at that so I do believe it is necessary to upgrade.