On scoops, bite the bullet and buy the best scoop you can, you will find it is well worth the cost. When your in the water waist to chest deep with rolling swells or rough surf; you want to be able to recover the target as quick as possible.
Some may disagree, it is only my personal opinion, but from what I have experienced the best place to be in the water is between ankle to waist deep, that is where I have made the majority of my jewelry finds. Remember ankle deep at low tide is waist deep or deeper at high tide.