need help for new rig around 30k

I want to buy a processor, ram, mobo and gpu..

1. What is the purpose of the computer? What all applications and games are you going to run?
Ans:Games like COD Ghost, battlefield 4 ,Assasin Creed 4, NFS Rivals.
Apps - Adobe photoshop cs6, maya, corel studio, fl studio, cubase, nuendo

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

3. Planning to overclock?
Ans:No

4. Which Operating System are you planning to use?
Ans: windows 7 64 bit(already have it)

5. How much hard drive space is needed?
Ans: already have 4tb hdd so no need

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: i already have a monitor

7. Which components you DON'T want to buy or which components you already haveand plan on reusing?
Ans: I want to buy just the processor, motherboard, ram and gpu. rest i have everything..

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

9. Have you ever built a desktop before or will this be done by an assembler?
Ans: Yes

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: local stores in guwahati and online sites too.

11. Anything else which you would like to say?
Ans: a little future proof system