I need opinions for/against the use of pistol grip ball heads and which type/brands are the best. I am a photo enthusiast shooting with a Canon 7D and using multiple lenses. I use a Fancier carbon fiber tripod with a Marumi ball head that works really well and is very stable. I want to get a quick release ball head for when I am on the move and need to tilt/pan the camera real fast. I want something that is easy to operate, offers a wide range of movement and will lock in tight when the grip is released. Finding this under $100 would be an added benefit. I don't mind clones either. I have been doing some research but keep coming up more confused than when I started. Suggestions and opinions are greatly appreciated!