PSU 650

I am searching for a good psu of 600-650w having a futur rtx2080 in mind, unfortunately all psu sold in my country are not good (aerocool, entry level cougar and TT...). Today one of the shop sent me a photo of a Redragon PSU fully modular 80+ bronze. I searched on Google and couldn't find it...

I'm buying a new laptop "soon" (Blizzard definition), and I've already decided 90% to buy this one: http://www.amazon.com/Dell-Inspiron-i3531-1200BK-15-6-Inch-Laptop/dp/B00KMRGF28/ref=psdc1_t1_B00LAGGR3W_B00KMRGF28 I know it's really cheap and slow, but I'm not that much of a high-level gamer...