Tons of great options available today in your price range.
But a couple things need sorted out prior to choosing which model:
1)The balance point and weight of your scope, including digiscope set-up attached(if you use one). The farther your optic balance point is from the scope's mounting plate, the more weight rating/spring return you need for easy & smooth usage. There are various types of shoe adapters, some are sliding/adjustable to compensate for balance issues...some are not(you may not need it anyway.
2)Do you want a true fluid head, or a friction/teflon type will do ?...some "fluid heads" are really not fluid....weight and size generally will go up with "video" fluid heads...along with price. But a far better product in operation and smooth subject locating. You only need a pan/tilt head(2 way), and because of your 80mm scope skip any ball style heads. 
3)Generally it's a balance between quality operation & weight gain...are you packing the optics in a long distance ?, are you traveling around hunting with it during stalks ? The better heads(heavier)are very adjustable in the settings, allowing the scope to just float and hold position when releasing hand....the cheaper heads are lighter and drift or sag after releasing...forcing you to lock/unlock/lock the head constantly.
Hope that makes sense, and didn't muddy the water 
