RAM: CORSAIR Vengeance 16GB (4 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model CMZ16GX3M4A1600C9B
Hard Drive: Western Digital Caviar Black 500 GB SATA III 7200 RPM 32 MB Cache Internal Desktop Hard Drive Bulk/OEM - WD5002AALX
That is the setup I wish to use.
I also want to know what kind of computer case that would go good with this setup and also what kind of fans to have/use?
1. There is absolutely no need for 16GB of RAM. Most modern games today don't even make use of 8 let alone 16. I would go down to 8GB unless you want to do some video editing or photoshopping along with it then go to 12GB but save you some money and downgrade.
2. The MoBo and CPU go good together as far as I can tell (I'm using a Gigabyte Intel H77 with my i5 3450 so they should act similarly) so you're good there. Get a Z77 I believe if you want to upgrade to 3570K for overclocking but you didn't mention that but I thought I'd throw that out there.
3. If you have the budget (a little more too if you downgrade RAM) then I suggest upgrading GPU to a Radeon 7850 or higher to a GTX670 if you got the cash cause they'll keep up with modern games for the next few years with max settings.
4. Hard drive is good but I would either upgrade to 1TB or get an SSD if you are going to be playing multiple games just to have some space but that's my opinion
5. Other than that I would make sure then that your PSU could handle it so at least 550W with your current build with at least 650W if you upgrade GPU
6. Case is personal preference but go for something with at least a few built in fans and at least one USB 3.0 integration to prepare for future so either a mid-size or full tower of your preference would do.
So in all, good build for just right now but if you want to have a little leeway for a few years I would suggest a few upgrades and one downgrade (RAM) to make it great. Hope this helps!
Right now, everyone is really pleased with the Crucial M4 series of SSDs. The size then come down to what you want on it. 64GB will get you just the OS and the thing and sometimes (like with Professional or Ultimate) not even that. If you go above 64GB, per example a 128B, you'll have enough for the OS and a few of your main games to install on there. The M4 128GB runs around $100-$130 last time I checked so it's an investment, but a good one IMO. Other than that I say you got a good handle on things. Let us know how things go.