If you are looking for mountain bike pedals, then I second the recommendation for the Shimano
M520, you can't go wrong with those.
If you are looking for road bike pedals, a budget alternative to the Keos, Forte pedals by Performance Bike are pretty good. They use Keo-compatible cleats.
Forte Corsa2 Team Road Pedals.
If you don't know the difference between mountain and road pedals, here's my take:
Mountain pedals: multi-sided entry (just step on it), sheds mud better, cleats are recessed in shoes making it easier to walk
Road pedals: single-sided entry (need to flip the pedal over), larger shoe contact area (reduces "hot spots" on your feet), cleats are not recessed in shoe making walking awkward
Note: most cycling shoes can use either mountain cleats (2 hole recessed) or road cleats (3 hole no recess), but not both. I say most because some road bike shoes have both sets of mounting holes in them (I've seen this on Lake road shoes, and I'm sure there are others.)
Many people use mountain pedals on their road bikes because of the convenience of clipping in (just step on it, no need to flip the pedal over) and being able to walk around more easily. Also, if you have road AND mountain bikes, you can use the same pedals on each. Roadies like their pedals because they feel more "locked in" to the pedals and the load is spread out over a larger portion of their shoe. I suppose the road pedals can be lighter as well, though I've seen some pretty light weight mountain pedals.