I have found 2 motors emax Mt 4114 and t motor MN 4010. They both are very close in spefications but emax is half the price of t motor! So which one between them?

I think you should go for pixhawk cause dji has flyaway problem
And maybe a 15000 to 20000 mah lipo battery

Will be going for pixhawk and tattu lipo

Look at tarot motors , Tarot 4008 320Kv is a good option. 
Also for the flight control , you have many other options , like JIYI K3 (for an example).

I'll look into those motors! I've worked with APM 2.6 so comfortable with pixhawk!

I have never used T-motors but heard that they are more efficient and rigid. They use better bearings and have long life compared to others. But true, quite expensive. Someone who has used both the motors may enlighten more. Also you can consider Sunnysky motors. They are cheap but very good performer. Very quite and the best thing is very very less vibration. I have used both emax and sunnysky and realized the later one is much better. Just my experience.

Thanks meet2ami for the info! The thing is that emax motor are cheap so its in my budget! Otherwise I'm having problems keeping in my budget!

Naveed which emax motor are u talking about I mean kV?? Price ?

He is taking about emax mt4114

It's 340kv and around 3000 from rcdhamaka!

Hi Naveed you can also look into Tarot Controller. I think it is good value for money.

A small suggestion, if you are going to use Pixhawk And 6S battery then don't use its power module or remove voltage and current sensing connections, else you may surprised with a PixFry.

Pls don't use pixhawk...

Naveed have a look at the motors on rcmumbai.com I suppose they are the same not sure have a look

http://rcmumbai.com/index.php/product/emax-multicopter-motor-mt3510-cw/
This motor gives 1700 gms of thrust
So 6 of those should give you 10200 gms of thrust
I think you can find better