I have a pocket radar, a bushnell and a stalker sport II.
The Stalker sport is easier to use for baseball than the pocket radar, and far more consistent/accurate than either the pocket radar or bushnell. The Stalker gets limited ghost readings, has great range, and measures to the tenth of MPH. It's more expensive, but it's worth it in my view. You can get it for $499 new, or probably get a used one on ebay for less.