Guys I going to build a future proof gaming rig can some one help select the config?

I am a web developer and not a hardcore gamer I am going to build a mid range gaming rig which would help me even with my profession. And it sure the rig would be a future proof so that i can expand over it.
I have a config in my mind guys help me in it. my budget is around 30 k -40 k.
Specs i have in mind are:-
Intel i5 3570k
Asrock extreame-6
2 X 4GB DDR3 CORRSAIR 1600 XMS
SMPS GSM PRO 800 SMPS
I ball Cabinet
Monitor not required

Guys please give me rates of delhi as I live in delhi

And thanks in Advance

1. What is the purpose of the computer? What all applications and games are you going to run? (Stupid answers like 'gaming' or 'office work' will not work. Be exact. Which games? Which applications? Avoid the word 'et cetera.')
Ans: Not hard Core gaming and Web development

2. What is your overall budget? If you can extend a bit for a more balanced configuration, then mention this too.
Ans:30k-40k

3. Planning to overclock?
Ans: yes

4. Which Operating System are you planning to use?
Ans:windows 7

5. How much hard drive space is needed?
Ans:2 tb

6. Do you want to buy a monitor? If yes, please mention which screen size and resolution do you want. If you already have a monitor and want to reuse it, again mention the size and resolution of monitor you have.
Ans:no

7. Which components you DON'T want to buy or which components you already have and plan on reusing?
Ans: HDD, Monitor

8. When are you planning to buy the system?
Ans:next month

9. Have you ever built a desktop before or will this be done by an assembler?
Ans:yes have built pc know how to assemble a pc

10. Where do you live? Are you buying locally? Are you open to buying stuff from online shops if you don't get locally?
Ans:New Delhi