You want great writing? Pynchon can write. Sometimes jaw-dropping images and ideas stop you in your tracks, and make you put the book down for a bit just to take it in.
At other times, the writing is deceptively simple. Just read the first line of this book. "Snow-Balls have flown their Arcs, starr'd the Sides of Outbuildings, as of Cousins..." With a few simple words we can hear the thump of snowballs on wood, we know that we are talking about a large family ("Cousins", not "Children"), the tense tells us we are probably at the darkening end of a winter day, and in describing buildings and kids as equal targets, we have a gentle wit.
So far, so what, maybe? Well, call me a ponce but in the reference to arcs, we have a reference back to Gravity's Rainbow, Pynchon's massive, crazy WWII novel loosely themed around the deadly parabola of the V2 rocket. In the reference to stars, we have a pointer in the direction of the theme to come in Mason & Dixon - astronomy and the cosmos, at the time of a shift in society's relationship to it. Mason and Dixon are brought together to carry out astronomical observations, and Mason uses the stars to navigate his line across America.
There you go, a couple of hundred words about the first line. You're in for a rich, astonishing read - just take your time.