If I buy a standard Alienware Aurora desktop will it be able to play games like Sims 3 and Age of empires 3 and various other somewhat high-definition games. If no then what should I upgrade on it which won't cost me more than 1400 dollars.
Should have no problem, if you post the spec's we might suggest first a SSD for the OS and or a better video card and ram. If you have some money to drop you could upgrade all three for 900.00 or less.
I bought mine from Amazon.com for $1369.00. I upgraded the RAM, and GPU's and could not be any happier. It came with a crappy video card so I had to replace that for sure. You would be fine with the base model for the games you mentioned. Then again, most of us Gamers are all about overkill!!