imarex :
Hello. I know there have been quite a lot of threads about this. (And I do not wish to start a flame war)
I'm planning to get a new PC rather soon and currently I can't decide between these two CPU's.
I mainly would use it for video editing (Premiere and AfterEffects), but I'd be playing games a lot as well. I've looked at a lot of benchmarks. i5 mostly beats FX.
Now here's the problem. I'm worried about future proofing my setup. I think FX would be kind of better as it has 8 cores and I would definitely overclock it.
But... Then again the i5.
Not sure. Your opinions?
if your looking for rendering in adobe premiere it is a toss up between the two:
having a CUDA video card is as much/more important than the cpu as the mercury engine being able to access the cuda cores of an Nvidia card.
as far as 'future proofing' many motherboard manufacturers already have bios updates for their Z68, P67 and H67/1 boards to be compatible with pci 3.0 and ivy bridge if they are Gen3 "editions" such as Asus:
http://event.asus.com/2011/mb/PCIe3_Ready/
so far what seems the difference between a sandy and ivy board is:
1) the ivy will have a third pci-e slot but running @ pci 2.0 standard will the others are pci 3.0(using a ivy bridge cpu on a sandy board will give you pci 3.0 as referred to in the previous link)
2) there is a display port on the back panel for most of the Z77 boards with some dropping the D-SUB output.
3) 2 more SATA 6Gb ports
4) 2 or 4 more USB3 ports on the back panel.
hey don't take my word for it, look at them yourself

MSI Z77A-GD65 'Ivy Bridge' Motherboard
http://www.legitreviews.com/article/1864/1/
Gigabyte's GA-Z77X-UD3H and GA-Z77X-UD5H
http://vr-zone.com/articles/gigabyte-s-ga-z77x-ud3h-and-ga-z77x-ud5h-hands-on-pictures/15102.html
ASUS P8Z77-V Deluxe
http://www.techpowerup.com/161582/ASUS-P8Z77-V-Deluxe-Starts-Selling-in-China.html
there really is no need to wait, getting a board not isn't going to be a disadvantage later unless you really need that third pci-e slot or four usb3/sata 6bs ports.
the socket 1155 isn't going anywhere in the near future with haswell more than a year away. and as far as ivy bridge being worth the wait, so far it is lower in power consumption but not all that and a bag of chips in increased performance.
http://www.anandtech.com/show/5626/ivy-bridge-preview-core-i7-3770k/5
except with a 50% in crease with quick sync.
sandy bridge is looking good for awhile. . . . i am glad i got mine now so if i do upgrade next year, i just have to get an ivy chip.