Best budget psu?

If you want a PSU at that price you're gonna get pretty much a garbage one that'll last only so long before it dies, or kills your system. Spend more money & get some quality - SeaSonic G Series are amazing for the price, are energy efficient, affordable at 85 USD, and they are pretty much silent. I don't know how it converts into euros, but if you want a good PSU, a SeaSonic will do the job & do it better than most.
 


Hi - jpoos linked you a good one if you can stretch a
couple pounds.

I don't recommend the Coolermaster elite or extreme series,
too many failed lab tests, and the Zalman zm is iffy at best.

Tom

in your range:

http://www.scan.co.uk/products/500w-corsair-builder-series-cx-cp-9020047-uk-80-plus-bronze-sli-crossfire-eps-12v-quiet-fan-atx-psu

http://www.scan.co.uk/products/500w-silverstone-strider-sst-st50f-es-80-eff-80-plus-sli-crossfire-eps-12v-quiet-fan-atx-v23-psu

http://www.scan.co.uk/products/500w-silverstone-strider-essential-sst-st50f-es-230-85-eff-sli-crossfire-eps-12v-quiet-fan-atx-psu