I am in Plano/Allen and on a large wooded lot which backs up to huge wooded park area for Allen. It is where the very few basement homes in TX are located. We built this house in 2000. Almost every year, we have Condren Tree Service come out to clear out the dead branches and to raise the canopy so we have a little more sun out back.
When we started building, we knew it was damaging to the trees and one reason we chose this wooded lot was for the acre and trees. So, as soon as we closed on the house, Condren came out and accessed each tree. On many, we got injections in the trees (vitamin boost).
In April, 08 when there was a bad storm, we do feel that we fared better because we do the routine upkeep of the trees. Condren did come out and clean up damage but our damage was minimal compared to some other homes in my neighborhood because we had already cut bad branches out.
They bring their crew with trailer and wood chipper... it gets loud. It is entertaining for children because the men climb the trees to get to the points where they need to cut. At times frightening to watch someone going up a tree (with a safety rope) and a chainsaw!
Our bill is usually $1000 +/- here and there. I have about an acre of heavy trees.
I don't know about your quotes... what I would do, go online, pull these companies up and check them out with BBB and Yelp reviews. We highly recommend Condren and I know for a fact they are not the cheapest but they do a great job. They have been around a long time and they are not a fly by nighter trying to make a buck.
Good luck