Windows 7 will take up at least 20 GB, which may increase with updates. This will leave you only around 25 GB on the SSD to use before things start to slow down.
My suggestion is to spend a bit more and get the faster, larger, and better featured Samsung 840 EVO.
Thanks for the quick answer, I purposely found the smallest and cheapest SSD with reasonable speeds to fit my budget. I'd go with the Samsung EVO, but it's just too expensive. 25GB is fine since I only plan on installing my OS on said SSD, with the exception of a few important softwares.
I guess you don't know about the problems with the Kingston SSDNow V300 ssd. About 6 months ago Kingston changed the brand and type of flash memory from Toshiba to Micron. The Micron flash memory is slower than the Toshiba memory. Kingston switched the flash memory to keep costs down. In addition, a corresponding firmware update (505) developed glitches. There have been several firmware updates since then. Kingston was slow to admit they changed flash memory which led to accusations of Kingston using bait and switch tactics.
To be fair I should point out that the practice of changing components is nothing new. It usually happens with low budget, entry level models. For example, PNY uses several types of flash memory in their Optima series ssd's. The difference between Kingston and PNY is that PNY published the fact in their specifications while Kingston did not. Veteran posters might remember what happened when OCZ changed the flash memory in one of their models. It also happens with DDR3 memory modules. No telling which chips you're liable to find when you remove those fancy heats spreaders that gamers and enthusiasts like. Veterans who have been here for a few years might also remember what happened when companies changed panels in monitors and components in power supplies. Companies typically have a clause stating that specifications and components are subject to change at any time for any reason.
I normally recommend Samsung. The Samsung ssd's perform very well and have a proven track record.
I maintain the ssd database listed in a sticky at the top of this forum section. Here is the link:
I have just about all of the consumer oriented ssd's listed in the database. Scroll down to the brands and models you are interested in and follow the links to the technical reviews.
A 60GB ssd is more than sufficient for just Microsoft Windows, drivers, and utilities. I have Microsoft Windows 7 Pro 64 installed. All updates have been downloaded and installed. Currently Windows takes up 18.1 GB after optimization and tweaking.