The difference between 2 and 2.16 will not be noticeable. You're probably talking about the e6300 vs the e6400. You might as well save the money and go with the lower clock speed. But if you are comparing the e6400 vs e6600, you have more level 2 cache which does make a difference. The 6400 and 6300 havwe 2mb level2, the e6600 has 4mb. So in conclusion, the e6300 and e6400 are basically the same animal. Go with the cheaper one. And choosing between the two won't make much difference for more monitors. That is mainly affected by the video card.