Write speed 200MB/s? You understand that your laptop CPU so data are not able to withstand. I won't tell you anything on prices but I will give a lecture on brands and controllers.
Any adequate person will tell you that the # 1 system this is the Intel G2. The series themselves there for the money choose. 40MB write speed? And you 4GB for fifteen minutes enough? I think the laptop so it will be barely loading of SSD. Further. Speed reading just tell 170Мб? And you know that the controllers of other firms write their har-Ki based on tests empty SSD? So it is worldwide known that controllers sandforce =< 1200, and an interface extension for a single record of information in cells lose speed (write and read in a cell) two times (approximately) and this is an IRREVERSIBLE process. So that's something. And all of these Vertices 2 and other Valves on here that slag.
Of a normal screw for the OS is that there is only the Crucial C300 (64/128/256), Intel G2 (40/80/120/160) and Oemi from Intel in the form of winds with values G2 and V/M/X/E. All. Other screws is a waste of money.
This is not advertising Intel))) it's just true. Indeed, until recently, was only Intel, but now after a hearty practice tests Krasilovskii screws put almost on a par with Intel. Good luck in choosing!