Sakkura :
Why are you upgrading?
The Intel 600p is only a little faster than SATA SSDs like the Crucial MX300 (I assume that's the model you're talking about), but a good SSD nonetheless. The Samsung 960 Evo is much faster, but also costs a lot more. And the extra speed isn't worth it for most uses. There's also the even faster and even more expensive Samsung 960 Pro.
Upgrading for faster game speeds , boot times and fast multi tab browsing.
I already brought samsung 950 pro 256gb for one my build , priced around 180$ , but it is expensive
So planning to consider intel 60p 512gb (just for 512gb storage) for 140$ or the samsung evo 960 256gb for speeds.
Becasue even if we buy 500gb ssd/pci-e or 256gb ssd/pci-e they fill up very soon.So I alread yhave secondary mechanical 2tb HDD.Since faster speeds and perfomance is criteria , leaning towards 960 evo 250gb for 130$..
PLease suggest ??