Pentax K-x Lenses
I've had my Pentax for a bit under a year now (got it late January). I still just have the kit 18-55 and 50-200 lenses. Can someone recommend some nice (sub-300) lenses I might add to provide me with some more options? I'm leaning toward a Sigma 70-300 f4-5.6 DG lense as an inexpensive (~$150) telephoto (450mm equivalent, because it's 35mm). Any other recommendations? Something y'all would recommend other than that lens? Any other lenses I should be looking for? I'd really prefer to stick with ones fully compatible with with Pentax.
Most commonly I take pictures at the dog park and boring scenery shots, and occasionally group/party shots. In other words, strictly amateur crap.