So confused about what I need concerning graphics card

You'll be fine with that graphics card. It's probably exactly what you need it to be. The system you described is totally fine for video editing. If you get anything more powerful, your videos will encode faster but the process won't necessarily be more stable.

The graphics card is primarily for rendering three-dimensional objects with artificial lighting as well as a lot of other elements which are common in 3D games. Basically, they are for playing games. They also run your display and video playback software but these applications really do not tax the card very much. Modern cards are much more powerful than they need to be for these purposes.

Some video editing programs also use graphics cards but, again, this doesn't really fully utilize the power of mid-range cards (like the one you listed). Having a good processor and sufficient RAM (you do) are more important.

Another very important thing will be to keep your computer "clean" of extra/unnecessary programs. In my experience, when a video encoding fails, it's usually because of some software problem and not because I was stressing my hardware.

Save your money and just get the 8GB of RAM. 16GB wont give you added benefits as you will likely never use more than 6GB unless you start running VM's.

That computer will be fine with your desired use.

How much are they charging for that system? You could build something comparable for about $700 w/o monitor and peripherals.

They are charging $1375. Not including tax and shipping.

Yikes, can you post a link of what all is included for $1375? Seems like a lot.

Dude, you're getting a Dell

An XPS 8500
3rd Generation Intel Core i7-3770 processor (up to 3.90GHz)
Windows 7
Trial Microsoft Office
16GB Dual Channel DD....
2TV 7200 RPM SATA Hard Drive 6.0Gb/s
AMD Radeon HD 7570 1GB GDDR5
16X CD/DVDD burner
Dell S2340L 23 Inch monitor
Dell KB213 Wired Multimedia Keyboard
Dell Laser Mouse
Integrated 7.2 with Save MAXX Audio 4 sound card
Dell Wireless 1703 802.11b/g/n/, Bluetooth v4.0+LE
Fear: (2) USB 3.0 (4) USB 2.0, Audio Jacks, RJ-45, VGA, HDMI
Front: (2) USB 3.0, MCR
Top: (2) USB 2.0 (One Powershare) Microphone, Headphones

Power: 460W

Slots
4 DIMM Slots
Wireless option WLAN combo card (802.11n + BT 4.0)


Don't know what a lot of this stuff means technically...

If you know how to operate a phillips head screw-driver I recommend you just put your own PC together. Below is a recommended build for you...

PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: Intel Core i7-3770K 3.5GHz Quad-Core Processor ($229.99 @ Microcenter)
CPU Cooler: Cooler Master Hyper TX3 54.8 CFM Sleeve Bearing CPU Cooler ($19.99 @ Newegg)
Motherboard: ASRock Z77 Extreme4 ATX LGA1155 Motherboard ($129.99 @ Microcenter)
Memory: Crucial Ballistix 8GB (2 x 4GB) DDR3-1866 Memory ($48.99 @ Newegg)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive ($69.98 @ Outlet PC)
Storage: Crucial M4 128GB 2.5" Solid State Disk ($107.95 @ Mac Connection)
Video Card: Sapphire Radeon HD 7750 1GB Video Card ($99.98 @ Newegg)
Case: Corsair 200R ATX Mid Tower Case ($34.99 @ Newegg)
Power Supply: Corsair Builder 430W 80 PLUS Certified ATX12V Power Supply ($24.99 @ Newegg)
Optical Drive: Asus DRW-24B1ST/BLK/B/AS DVD/CD Writer ($19.99 @ Microcenter)
Monitor: Acer G236HLBbd 60Hz 23.0" Monitor ($139.98 @ Outlet PC)
Operating System: Microsoft Windows 8 (OEM) (64-bit) ($89.98 @ Outlet PC)
Total: $1016.80
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-02-02 11:59 EST-0500)

Okay now in this proposed build, you would have a stronger CPU, better motherboard, better/faster RAM, a Solid State Drive AND a Hard drive, the SSD is going to boost your boot up and application loading speeds x10, and a better graphics card while still spending a few hundred less. Now this machine I have put together is easily overclocked to 4.2GHz, something that you wont be able to do with a Dell. You will have to assemble all the parts yourself. I could cut some corners, lower the cost to about $850-$900 , and still be faster than the Dell you linked, if you wanted. Also I could make it easier and have one supplier for all the parts (Newegg for example) but it might cost a few dollars more.

Wow...I really appreciate what you've done to steer me in the right direction. But, I wouldn't have a clue how to put it together. I can ask around and see if there are any computer folks who might be able to do this for me. Are there any places that can show me how to put such a computer together? Thanks stickg1...much appreciated!

There's tons of tutorials and even video tutorials on YouTube. Search it on Google or your preferred search engine. It's easier than it would seem to build a PC.

I'll check them out...thanks!

I'm thinking of getting Power Director 99 Ultimate. Has anyone worked with this before? I'm used to windows movie maker.