I need a new wide angle lens...the old 18-55 kits lens just really isn't sufficient as a solution
Can anyone recommend a good wide angle (preferrably not a prime, just because I like to have a little flexibility, even though I am a fond adherent to the "move your feet" school

)
something in the 10-20ish range? Is there anything in that range in the general $350-450 price point?
If so, is there a standout? (I have a k20d and k100d, if it matters)