Have you considered building on yourself from scratch? I am not sure if this is something your ok in doing, that way you can decide what you would like to get out of the computer based on your needs rather than buy a branded system and get things that you may not need, building your own will be cheaper and you may get more from it.
If not, that Alienware isn't badly priced, my currency is UK pound, so that memory upgrade seems worth it(£32)
I haven't built a computer before. I could possibly get some people to help me with it that know how, but I don't know how difficult it is. Do you think that Alienware could play those games well? I can't find anything on its graphics card.
I'd be going for the $700 one with a $50 upgrade on the memory from 4GB to 6GB. Do you guys think this would be a good buy for my needs?
If you think there's a better computer I'd also be open to that. Thanks in advance for any advice.
Please, for the love of god, never ever mention Alienware.
Just do some research on PC components and see how each one works. This will give you a better idea on how to build a PC. Building a PC is WAY cheaper BTW.