prodolphinplayer

front if you respect the laws of physics
 
top intake if you don't

Sorry for the late reply -- been busy.
 
For rear exhaust, NF-P12: https://www.komputronik.pl/product/148695/noctua-nf-p12-pwm.html
Front intake NF-P14S': https://proline.pl/wentylator-noctua-nf-p14s-redux-1500-pwm-140mm-1500rpm-p934142
 
Vortexes are similar and slightly cheaper alternatives: 
https://www.komputronik.pl/product/274420/cougar-vortex-hdb-v12hp-wentylator-czarno-pomaranczowy.html
https://www.komputronik.pl/product/274421/cougar-vortex-hdb-v14h-wentylator-czarno-pomaranczowy.html

If you don't care for looks, Noctua has some excellent fan selections.
I'm not saying they don't look good, it's just an acquired taste.

and, if I flip my psu so it will suck that hot air from gpu and then pull it out, will it help?

Meshify C is very good, it's hard to go wrong with it. The only limitation is if you decided to upgrade your PC in the future and you want to use a liquid cooler mounted to the front of the case. In that instance, the Phanteks Enthoo Pro M TG would be a better choice. Otherwise, it's hard to point to a beyltter case if you already like the Meshify C as it is. 

Thank you, i will go for Meshify C with light glass.