For editing/rendering yes the i7 is the better choice of the 2 most certainly. And the 7450 is a less then average card but surely it is better then the 2500 graphics from intel. For what you are doing I'd say it is a better option of the two to go with the i7 with the better card the power supply probably isn't amazing but if it works it works if you wanted a better card you would need to change the POS out.
If you only spend a little time rendering video, the extra cost for the i7 may not be worth it, but it will be faster with 4 extra logic cores. A discrete 7450 is better than onboard 2500 -- probably to the point where some games are actually playable -- but if gaming was a concern I'd recommend an actual gaming card.
The question you need to answer is saving time rendering video worth $150. If so, get the i7.
I do agree that if graphics were more important to you that a card bought would be the better option. Also I agree that the 3570 would do more then fine with what you are doing. Have you ever thought on building a machine rather then getting a store bought computer.
I have considered building a machine, I built a few in the past, but fell out of touch. I think I have the ability to put a kit together, but the ones I looked at brought the price a little out of my budget, factoring in OS.
What is a the best place to look for barebones or kit systems? I have glanced at tigerdirect and newegg, but don't really know where to start.
Thanks bigshootr8, as mentioned, I am looking for a home PC with video editing capabilities; with gaming of little or no importance. My budget would be around $650, including the price of Windows 7. 1TB HD min and several USB 3.0 ports. I don't overclock, so that doesn't matter as well. I saw the forum where people put together a list of their builds, but they seem to be focused on gaming machines. Which is fine, just not what I am after. Is there a more appropriate forum to post my wish list and budget? Again, thank you for your help.
bigshootr8, that is awesome. Thanks for your time with this. This provides a great place for me to start, and possibly end. I am not familiar with part picker, but I may have to check that our for myself. How do you import the specs from partpicker onto this message board? Is is automatic?