Return it...If you hate it now...just wait...
$250 is a small price to pay for happiness and piece of mind. Call it the price of a lesson learned.
Agreed with these. If you're not happy with the alienware now, you're not going to get happier with it as time goes on.
It sounds like:
1) you don't like windows
2) you don't like having two computers
3) you like playing games
Thus, I'd say a macbook pro is the right choice for you, so congratulations on settling on that.
Now, as between a 15" with display and 17", I'd say the former. You get(essentially) the same power, more portability, and more screen space at your desk.
And finally - try not to worry about all of this so much. At the end of the day, it's just a computer and just money (I know money can be a big deal, but this doesn't sound like a "feed-your-family or heat-the-house" situation). Really, nothing here is worth the mental anguish you've put yourself through. You're down a few bucks and some time spent on all the sales and returns, but that's really not so bad. And now you'll get something that, IMO, sounds just right for you and hopefully be happy with it. Good luck.
