30x loop or microscope is all you really need to see Trichs and bugs.
I use a loop if there is enough light or I use a lighted microscope that goes from 30 to 100x.. 100x is to close and you can't really see anything.
I use the 30x and 60x settings the most, 60x is good for me to see tiny bugs, eggs, etc..

I am new to the growing game so I may get this wrong and please correct me you pro's if I am

If a trich is amber it gives more of a "body high" and can cause "couch lock"
If a trich is cloudy its more of a "head high"

I have read alot of people like to harvest around 75% Cloudy / 25% Amber.

Hope that helps.. and next time take 30 seconds and do a search. This board is filled with very smart people that have already been down this road and have written about it.

Good Luck