I believe that the AMD system would be the better machine for video editing. And with such a huge price difference, if video editing is your main application, then the AMD system is the way to go
I'll just leave this here, I felt compelled to post this in a thread a while ago and happened to have it saved. It is not directed at anyone, more of a reminder of why we are here
The component manufacturer shouldn't come into it unless it bears relation to component quality and reliability.
It should be about what hardware would be most suited to the client and his/her needs.
I have an Intel system because it is best for what I want to do with it (which is gaming). If AMD chips were better for this purpose I would have bought an AMD based system.
The OP has a budget, we are trying to stick to it while offering up what we honestly think is the best system he/she can buy for his/her needs with the money he/she has to spend.
It is unfair to persuade people to buy a computer with your favored make of CPU (or GPU) because you think they should, without justification.
I have seen it on here before where a group of members overwhelm someone asking for help, and before more even headed people with more experience can step in to pick up the pieces, it is too late and the OP has already ordered the 'wrong' components. Meanwhile, said members have already wandered off to mislead other people.
If you are not 100% sure of your words when you make the claim that one CPU is better than another for a specific purpose, don't state your opinion as fact and go and do a little bit of research.
If however you are an avid gamer, and would take gaming performance over video editing performance, then an Ivybridge i5/i7 system would perform noticeably better, and while they may be on par or below with a Piledriver FX-8 for some types of video editing, they will still handle it admirably. Just as the FX-8 will still handle gaming admirably.
Each CPU specialises in a different area in terms of performance, but they both offer great performance figures across the rest of the board.
Which CPU performs better will also depend on how heavily threaded the processes are. Ivybridge tends to handle single threaded better, and Piledriver tends to handle multi threaded better.
Either will perform remarkably better than your current CPU.
But there is always the massive price difference to take into consideration as well.
Some benchmark comparisons for productivity and gaming:
Q6600 vs i5 3570K
Q6600 vs FX-8350
i5 3570K vs FX-8350
i5 3570K vs FX-8320
i7 3770K vs FX-8350
i7 3770K vs FX-8320
FX-8350 vs FX-8320
i7 3770K vs i5 3570K
3570K - £190
3770K - £270
FX8350 - £180
FX8320 - £140
Capable motherboards for the AMD setup will generally be considerably cheaper unless you drop to an H77 or B75 chipset for the Intel based configuration.
In terms of upgrade paths, the maximum RAM and PCI-E bandwidth etcetera will depend on the motherboard. CPU wise the 3770K is the end of the line for the 1155 socket because Haswell will be taking us over to the 1150 socket. As it stands currently the FX-8350 is the end of the line for the AM3+ socket, however to the best of my knowledge, there has been no word as to whether the next generation of AMD CPU's will continue to use the AM3+ socket or not. If anyone knows otherwise, please do tell
Hope this helps
- acme -
*edit* slight revision - the 3770K will perform the best for almost every task, however it is up to you as to whether you think the enormous price gap is justified by the increase in performance.