Definitely don't buy the SP3 with gaming in mind!!! It'll play a lot of indie or older games fine, but no way Witcher 2 etc type games.
The SP2 was actually decent, be it still on all low settings for most newish games at 720p, but the SP3 is actually a LOT slower than the SP2 in games due to the throttling (for example, a game will start playing at 30fps, and then drop to 15fps and stay there as Microsoft locks the GPU at 598mhz instead of letting it run closer to the 1098mhz it is suppose to), and the SP2 is still magnitudes slower than even a low end gaming laptop with a dedicated GPU.
You can get a nice gaming laptop that is literally 8x+ faster than the i5 or i7 for the same price or less.
If gaming isn't a big priority, by all means enjoy the SP3. Just know what you are getting for your money.