maybe i'll buy spd-sl pedals since they give more performance and i don't want to walk that much during my rides

So now i need to buy spd-sl pedals. What do you guys recommend? I want some cheap ones with some quality too
I have to buy shoes and pedals so i can't really spend much

thks

Edit: i was searching and found these

http://www.bikezone.pt/?1&it=produto...=1174&ctd=1174

what do you guys think? They cost 56€, it's really max i would give for pedals, are they good?