[citation][nom]AMD_pitbull[/nom]Speed is nice...affordable product is better. Which is more popular? i7-990x or i7-2600k?[/citation]
Popularity doesn't equate to a superior product. These are the latest high end SSD's, if you want affordability buy an older one.
The i7-990x is a 6 core processor too, if you run applications that can utilize all cores that would clearly be the better processor to use.