Entry level chronograph

"jps2486"
"wll2506"I use Pro Chrony Digital for around $100 and it is great, much better than the green or red fold out units I have had in the past.

wll2506
I second that motion. I've had two of them and their performance is perfect.
I'll 3rd it - works great. Budget for a good tripod though too...makes set up easier. I was looking in your $ range when buying and there were too many good reviews on multiple sites to not spend the extra 10-15 bucks and keep from second guessing the little money spent later. 
 
I have a pro Chrony digital with the pc interface. I'm am new at air gunning but have cast and reloaded all my own ammo for many years. Had mine up on a camera tripod and a clumsy friend tripped on the cord and over it went. Broke one of the sensor "eyes" off its circuit board and I had to buy another one.

harbor freight makes a cheap carry case with a foam block that is partially sliced at 1/2" increments in every direction. You just pull out foam cubes until you have a void the size of the unit. Cord, USB adapter, rods, and sun screens fit nicely and keeps it safe.