i own a k3s i paid around $650-700 for and its great.
i7, 8gb ram, gt540m gpu, 640gb hdd (upgraded hdd to 256gb ssd)
i bought my mother an i3 version and it works great for her more limited use.
both do not have a 1080p but its not a huge deal for us. i've even played games on mine and do not notice a huge difference.
the sims is not a very demanding game. i'm willing to bet even integrated video cards can handle it without issue. unless you are playing ut3, farcry, crysis or other super high detail games i would say dont worry about it.
one of the best upgrades you can do though is to download all of the drivers, buy a ssd drive and reinstall windows and the drivers onto it. manufacturers put way too much crapware on laptops which slow them down and the difference between a stock 5400rpm drive and ssd is night and day. my laptop boots up in under 9 seconds.