The G50 (amazon:http://www.amazon.com/gp/product/B00K6ZIFAQ/ref=gno_cart_title_0?ie=UTF8&psc=1&smid=ATVPDKIKX0DER) or Z50 (amazon: http://www.amazon.com/gp/product/B00NNQFNV4/ref=pd_luc_rh_sbs_02_03_t_lh?ie=UTF8&psc=1)
Or do you have a better deal for approx $400?
8GB of RAM will definitely allow you some smooth gameplay. Is it DDR3 for both?
I think that, out of those two choices, the Lenovo Z50 is the better option, because of the increased RAM, although they both look like good options. I don't know much about the difference in processors, sorry that I couldn't help you on that.
I have found this computer while looking around on Amazon:
http://www.amazon.com/HP-Pavilion-g7-2270us-17-3-Inch-Processor/dp/B00ANKMYN8/ref=sr_1_7?s=pc&ie=UTF8&qid=1416281949&sr=1-7&keywords=laptop#productDetails (sorry for lack of picture, I'm not sure how to do that on these forums)
This computer is amazing for the price, 480$ if you don't mind refurbished, and has great specs. The one fault I find with it is that it only has 6GB of RAM, which is still plenty for pretty much anything, unless you are planning on using RAM intensive tasks, like heavily editing HD video or something like that.
