That block of text is nothing to what you typically find in this forum.
You are correct in that there is no reason for an i7 in a gaming rig, an i5 will perform just as well.
Nearly everybody here will advise you to custom build your system, It will work out cheaper and you will know exactly whats inside the thing. Plus you get to act like a mad scientist and scream "ITS ALIVE!" when it POST's for the first time (I cant be the only one who does this).
CPU: i5-3570k. $230
http://www.newegg.com/Product/Product.aspx?Item=N82E16819116504
Motherboard: AsRock Z77 Extreme4. $135
http://www.newegg.com/Product/Product.aspx?Item=N82E16813157293
GPU: Gigabyte GTX670. $400
http://www.newegg.com/Product/Product.aspx?Item=N82E16814125423
PSU: Corsair TX-650M. $110
http://www.newegg.com/Product/Product.aspx?Item=N82E16817139031
RAM: G.Skill Ripjaws 8GB (2x4GB) 1600Mhz CL9 1.5v. $46
http://www.newegg.com/Product/Product.aspx?Item=N82E16820231314
HDD: Seagate Barracuda 1TB 7200RPM. $90
http://www.newegg.com/Product/Product.aspx?Item=N82E16822148840
SSD: OCZ Vertex 4 128GB. $120
http://www.newegg.com/Product/Product.aspx?Item=N82E16820227791
CPU Cooler: Coolermaster Hyper 212 EVO. $35
http://www.newegg.com/Product/Product.aspx?Item=N82E16835103099
Case: This is largely personal, so here some good choices, pick the one you like the look of.
Coolermaster HAF-XM. $130
http://www.newegg.com/Product/Product.aspx?Item=N82E16811119257
Corsair 400R. $100
http://www.newegg.com/Product/Product.aspx?Itb
,,
em=N82E16811139008&Tpk=400R
NZXT Phantom of varous colours. $120
http://www.newegg.com/Product/ProductList.aspx?Submit=ENE&DEPA=0&Order=BESTMATCH&N=100006644&isNodeId=1&Description=NZXT+phantom&x=0&y=0
Total: $1295 (HAF-XM picked)
If you need it
Windows 7 Home Premium 64bit OEM. $100
http://www.newegg.com/Product/Product.aspx?Item=N82E16832116986