what line is good for watching your line movement? will a High-vis yellow effect the fishing??

probably not, it is personal confidence in what you are throwing.  I myself will not throw anything above 6 or 8 lb. flourocarbon in clear water.  I have even scaled down to 4 lb. many times last year.  I have never really tried dropshotting in dirty water, i dont think that they are very effective because they dont move enough water to attract the bass.

ben

I like the Yo-Zuri Hybrid Ultra Soft #6 green. It's easy to see above the water line and it disappears in the water. Try it, you will like it.

Ronnie

I have been using 6lb Sensation and really haven't had any complaints at all.  Getting a good hookset in 35+ can be tricky with 6lb line but with the lower amount of stretch in this line it really helps.  Almost all of my DS bites are "pressure" bites and probably wouldn't help if you could see your line move since they are just more or less sitting there with it.  MHO