I can understand your being a bit lost..so much to choose from.
I am providing a few suggestions from newegg, but it is entirely up to you what you decide on.http://www.newegg.com/Product/Product.aspx...N82E16817173043
Here is a description from this link.
Need more space? Is your new hard disk burning up in your old enclosure? Try the brand new Rosewill RX-358-S! Designed for extra ventilation and enhanced cooling for years of use, it has an 80mm side fan. Air is brought in through the side and directed out the rear, for direct cooling of your drive. You don't have to worry about overheating your hard disk anymore.
Using either USB or eSATA cable, an extra 3.5" SATA hard drive (up to 2TB) can connect to your PC without opening the case. The RX-358-S is hot swappable, so it can be connected or moved without shutting down the computer. With your eSATA connection, you can see transport speeds up to 3Gb/s! Speed your transfers and lengthen your drive's life with Rosewill!
Tell me what you think of this one.