There is deal currently available from Amazon that would give you the 300 mm lense kit for a 644 $. This includes the 18-55 mm lense and 55-300. I think
Pentax K-x 12.4 MP Digital SLR with 2.7-inch LCD and 18-55mm f/3.5-5.6 AL and 55-300mm f/4-5.8 ED Lenses (Black) is the best deal currently on market.
I remember seeing somewhere that 200 mm lens was a pretty good lens and most reviews would probably be based on the time when it appeared. It started showing its limitations at higher resolutions. 300 mm lens shows sharper images for the same camera. Most reviews on the kit lenses are favorable.