SSD Upgrade

So I found out I can get Server 2012 R2 Datacenter (Windows 8.1 without all the extra garbage, which I like) and Server 2008 R2 (Windows 7 without all the extra garbage) and a ton of other juicy stuff for free from my school so it gives me an excuse to freshen up and start with a clean OS since this Windows 7 edition has been installed for a while (2 years +) and is getting slower.

I figure I might as well get an SSD. Strict budget of $250-$300. I know I said I want to save for new GPUs but that can wait, I'll just open the window and hope Winter is extra cold this year, teach those 670s a lesson =P

Prefer size to speed, since I may have to use SATA II ports since my motherboard's older non-native-to-chipset SATA III uses a 3rd party chip which I hear causes issues sometimes. Might work but it may not, so keep that in mind that speeds may be limited to SATA II.

I was looking at http://www.amazon.com/Samsung-Elect..._4?ie=UTF8&qid=1410842783&sr=8-4&keywords=SSD

which seems freaking perfect for my pricepoint and is 500GB which is very nice.

I do love Corsair too

http://www.amazon.com/Corsair-Force...pc&ie=UTF8&qid=1410844099&sr=1-6&keywords=SSD

and Crucial takes the cake for the cheapest 500 GB SSD

http://www.amazon.com/Crucial-MX100...pc&ie=UTF8&qid=1410844208&sr=1-1&keywords=SSD

Any ideas?

The Corsair sorta competes with the EVO in reads, but is about half as fast in writes (albeit, you don't write too often). Since it's more expensive, I say no. The MX100 is a little bit more interesting, being that it's $40 cheaper, but the 840 EVO still beats it almost across the board in benchmarks. $40 is $40, though.

I might be limited to SATA II though, depending on how the craptacular 3rd party SATA III chip acts on this older motherboard. So $40 would be a welcome save, since SATA II is limited to like 250 MB/s iirc