Upgrading PSU need some help pls!

[Aksiom]

Im upgrading my PSU preparing for the new video cards to be released this year. Im currently looking at the Deepcool DQ750ST 750W Gold its not something special but I cant find a good review for it or anywhere to say if it is reliable im currently using a simular version but its 550W and at the time I didnt think to search for a review i just thought it was good because it was a Gold rating and with a good price. Im also looking at the Thermaltake Smart SE 730W Gold its modular but I can find reviews from 2012 about it so its pretty old not sure if the age is a big factor or not. And lastly im looking at the EVGA Supernova NEX750G 750W Gold which looks great and EVGA is a very well known brand for PSUs, but its second hand dont know if I should trust second hand for something so important, and im on a tight bugget around 80USD, but not many options exist or are offered in eastern europe so some suggestions may not be possible. Im going for 700+W because im not planning on a upgrade anytime soon and 750 should be more than enough for years to come and for the new graphicks cards comming out this year.

Sorry for bad english.

[boggy77]

gpus coming out this year won't be more power hungry than the existing ones. given that a 550w psu is in most cases enough for any cpu+gpu combo, I wouldn't think you need to upgrade. however, the deepcool dq-st series isn't great for high-end systems (see psu tier list in my signature).

i recommend going with a 550 or 650 w psu from tier A

[Gorilla Warfare]

NEX750G 750W G....Not a good choice for an EVGA PSU. Look for a G2 series.

[IC4]

Honestly if you bumped up your price to 100 you can get a seasonic focus gx 650 for around that price. Wouldn’t skimp on a component that can cook your system.

[boghubodaghi]

Out of the three, the DQ ST is the best. I know it's one of the cheapest decent PSUs out there. The Nex G should be avoided. It's based on the Aurum platform that is group regulated. The Smart SE should be entirely avoided, it is an old design that seems to be a repurposed Smart 730 that was already pretty crap in 2012, let alone now. 

 

You might be missing some hidden gems in your country. If you can give a link to your favourite online store for reference, it'd be much easier to help.