What exactly are you looking for here? REAL target shooting without the hassles of gun ownership? Or just something to dink around with in your free time?
If its just something for you to blow off steam with, 300fps will be fine. Keep in mind tho, thats more than enough to break a window.
Heres the obligatory pic that I cant post here
http://www.paulmcelligott.com/images...tmas_story.jpg