I have 2 sets of throwing knives. the first is the cheapest, which is some kind of soft steel, made in tawian, bends if you throw it at wood!
These are handle heavy, but a little longer and heavier than the Hibben throwers I have, which is the other set I have.
The hibben throwers cost me 3 times as much as the cheap ones. They are shorter, but sharper and look better. Also, you can safely throw them at wood without them bending, even when I miss and they hit concrete nothing much happens (probably not throwing them hard enough I hear you think!

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Anyway, i find them to be nice dinky knives, and use these as my primary throwers. However, I don't like them too much as they really need to be thrown by the handle (don't ask me why!) and the weird size/shape of it makes it slightly uncomfortable to hold properly. Blade is nice though I don't seem to be as effective with them as handle. I must say though, at least with the hibbens they are truly balanced and can be thrown either way.
I generally throw my hibbens first, and if I'm bored will take a step forward and power the cheap ones into the archery target I use, a step being the required distance I feel. these aren't as unifor in flight, but being basically a dart, go straight through the soft target. If i'm using hard targets, or want to use more skill, I use the gibbens.
hope these insane mumblings help!