why would i get a whole new mobo and that when my cpu is almost the same as that thing.
It's not the same, its unlocked and can be pushed hard to become a really powerful CPU, plus by getting a new mobo you leave yourself room for easier and newer upgradability. Plus, the E6700 is on an outdated socket. Its actually really inefficient to keep getting 'better' CPUs for an old socket because of the price for performance and they use a lot more power.
Plus by upgrading the Mobo you get access to a lot of feaures like UEFI BIOS (fancy schmancy graphic BIOS) better power thermal designs and especially newer RAM and PCI technologies like DDR3 and PCI 3.0 (even though DDR4 is around the corner).