if you look thru previous scoop posting's you'll see a large variety of models. I prefer a large basket with the handle at 90 deg. i like to recover the target on the first scoop, the bigger the basket, the better the odds of this happening. However there is the issue of weight,
the bigger the scoop the heavier it is usually. you must also remember that big baskets hold lots of lake bottom, which is way heavier than the scoop itself. that is the reason that i prefer the 90 deg. handle. if i lift straight up on a 90 deg handle scoop it doesn't spill bottom material & potentially the target out as easily as a scoop that has a handle at an angle. i don't have strong enough wrists to tilt a large load of lake bottom back to keep it from spilling out of scoop.
i would recogmend a handle that floats, thus i use a wooden handle. if/when you let go of scoop handle it is usually easily seen and recovered.
i also use a sifter to deposit scoops of lake bottom in and let wave action sift off all of the light stuff (sand, mud, etc) every so often i use a vibraprobe to locate targets that aren't visible in larger debri like gravel. for me this speeds up recovery time significantly, thus giving me more time to find targets in the bottom. it also has increased the number of small targets i recover exponentially!
these are just my opinions, and i'm sure you will find many others, read them all and use what works best for you.
here are some pictures of my equipment. hope this helps!
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[attachment 111899 sifterwithtoeringandclad1resized.jpg]
hh steve