is the Sharkoon WPM 700 Bronze psu good?

No better than any generic PSU. Sharkoon's units are Tier Five on Tom's Hardware's PSU Tier List (Link in signature). Quoting from that article:

Tier Five
Avoid IMMEDIATELY. These units are highly unsafe to use. No such protections added, very thin gauge wiring used, false advertising and too much to list. Reference to a higher tiered unit for a better, money saving and a much safer unit. For your safety's sake, please don't order or pick one up for use in your system. These units are a potential fire hazard and could even kill you, let alone your system.

Not to be used even in low power builds for normal use, let alone gaming PCs. Go with a Tier One or Two PSU from that list. What is your budget in your local currency, and where are you buying from?
 


What specific GPU do you have, or plan to upgrade to? I'd guess you have a R7 260X at most.

http://www.skroutz.gr/s/417911/XFX-ProSeries-450W-Core-Edition-Full-Wired-Bronze.html
http://www.skroutz.gr/s/314936/Seasonic-S12II-520.html
http://www.skroutz.gr/s/2853427/XFX-TS-Series-550W-Bronze.html?from=catspan
http://www.skroutz.gr/s/7177999/Super-Flower-FX-450W.html

All are superb PSUs for the price. They'll handle anything in the R7 series easily. I gave a few choices just in case one doesn't ship to you or is out of stock.
 


Go with a 4GB 380 instead of a 960 (The 4GB 960 is useless due to the 128-bit bus). The extra vRAM helps in more intensive games, and makes it a bit more future-proof. It generally does a bit better in games (~5 FPS more).

As for the PSU, both the 960 and the 380 will run happily on a 500W PSU. Go with the XFX TS 550 or the Seasonic S12II 520W. You can overclock a bit too with a 550W PSU (I wouldn't risk it on a 520W if using the 380. The 960 is fine overclocked on a 520W PSU however).
 
The XFX TS series and the Seasonic S12II are nearly identical in quality. Inside, the XFX is nearly identical to the Seasonic SSP-550RT, an OEM model of the S12ll (or the SSR-550RT). If I were you, I'd go for the 520W if you're OK with not overclocking if going with the 380. The premuim you pay for the XFX in this case is simply not worth it, seeing as they are essentially the same platform inside.
 


Can't really go wrong with a gtx 950 if looking for something cheaper. The gtx 950 with a decent overclock can perform very close to the gtx 960. If you want something with more power then I would go with the R9 380 as the gtx 960 doesn't have a great value for how much you pay.
 


Not quite. The 960 is still 5-10 FPS faster depending on the game. Both are less powerful than the 380 though, and the extra vRAM will help in the future.
 


I can definitely agree that the R9 380 is a much better performer than the 950 and performs around 15-20% better than the 960. Just figured when he asked for something cheap he meant considerably cheap.
 


Have to agree with seasonic 380 build, should perform very well at 1080p.

On a side note, Nvidia really needs a 4Gb 960ti with a wider memory bus.
 
On a side note, Nvidia really needs a 4Gb 960ti with a wider memory bus.

That would be a competitor to the 380X; a perfect mid-range card. The gap between the 960 and 970 is unusually large. However it doesn't seem likely since Kepler's 760 Ti was an OEM only card. I don't think Nvidia would wait such a long time in-between launches if they were going to release a 960Ti. Pascal is probably going to be next.
 


I have to agree, Nvidia is just going to keep going with pascal and not leave such a big gap next time. Their is actually a 960 oem that is a lot like what I assume a 960ti would be: http://www.geforce.com/hardware/desktop-gpus/geforce-gtx-960-oem/specifications
 


Then get a 950. You will face problems in the future when the 2GB vRAM becomes a bottleneck however. It is probable that the 950 will also have problems in future games due to lack of raw power, something that the 960 and the 380 most likely will be able to cope with.
 


I would suggest the gtx 950 however, you may also be able to find last gen AMD cards for a good price.