Um.. no offence, but Acer is.. crap. D: They have a bad rep for building low-quality junk. I chose to disregard that rep when I bought my netbook, because that Acer thing got decent reviews and it was cheap. That has proved to be a mistake, as the webcam on that thing died 2 months after the warranty period ended. :|
I dunno how Samsung is rated in terms of laptop build/engineering quality. Probably better than Acer, at least. HP has committed many sins in the form of poor engineering, leading to overheating and other issues with laptops belonging to some of my friends. (In one of the cases, the girl had a warranty with Best Buy, so they kept shipping her HP for repairs, they'd replace the motherboard, and the overheating issue still wouldn't get fixed. They did that 3 times, until they were forced to give her a refund in the form of a gift card as per the warranty's terms so she could buy a laptop that didn't suck.) Dell has a bad track record as well, but their new 15z model looks tempting...
All in all, I would not trust a consumer laptop.. unless it's one of the higher end lines, like Dell's 15z. But even then, it's still a gamble. If you don't care if it starts having problems after a year or two of use, then I guess it's an option. I'd suggest paying a bit more (or getting less powerful hardware) and going with a business-grade model, specifically Lenovo's ThinkPads, like the
T series. They always have sales and coupons for them, making the prices a bit more affordable... I managed to configure a decent T420 for $998, lawl.
Still, if you want more processing power for your $, and quality/reliability, or portability don't matter to you, then the Samsung Shirayuki linked to is a better deal. Or you can check out Lenovo's non-ThinkPad, consumer-oriented lines. They are not built as tough, but may still be better than many other brands around.
In any case... in terms of specs, the main thing you want to look for is the 2nd gen Core CPU, denoted by the model name Core i3/5/7-XXXX (4 numbers for 2nd gen, 3 for previous gen). The 2nd gen chips have integrated graphics which are good enough for basic gaming needs, unlike Intel's previous attempts at GPUs. :P My friend says her laptop handles Vindictus smoothly with the Intel HD3000 that's built in the Core i5, but I'm not sure what settings she's under... so someone else better confirm. A dedicated graphics chip is nice to have, though. You want 4GB of RAM, minimum.