Building your own computer is ALOT cheaper and funner. I'd reccomend you build your own computer to save some money and they are better because they don't come installed with crapware etc.
Actually i voted not on the manufacturer, but at the operating system, the stuff that comes with the PC. The 500 gb memory, 4 gb ram, the possible 2-3 GHZ processor and good Video card was what i took into consideration. however if SMR believes e machines suck, i would definitely listen to him.
That said i would take # 2 as my second option. once again similar specs and etc but a different company and the GB space is a bit more. The video card is great and comes with printer. Thats my view.
The ASUS PC, in my opinion is the best. Just buy a AMD Phenom II X4 and add that in, then upgrade the graphics card to a ATI Radeon HD 5770. ASUS has a lot of support for Motherboads, so find your motherboard model and flash it with new firmwire.
I would also suggest building your own Computer, as it's a lot cheaper and a lot higher quality.
I just bought an HP a month ago and love it. So far I have been able to multi-task very well, and run everything I need to on the highest settings. Although I purchased better equipment than you are going to, it still gets my vote.
-4 gigs of RAM is plenty for what you're doing.
-If you're recording HD videos I would suggest a larger Hard Drive.
-Intel vs. AMD.. you'll hear good arguments for both, so I wouldn't worry about it.