I agree. One book that is both enjoyable and technically well written is Salman Rushdie's Midnight's Children.
I read it because it was supposed to be good (Booker Prize winner) but what I didn't expect was for it to be enjoyable. Well it was great! I would never have guessed it was going to be so good a read. You've got kids born with superpowers! Like X-men in Bombay! (not quite... it is a literary novel, not an action adventure) Entertaining and well written, it also deals with real historical events and issues arising from the birth of India and Pakistan as nations. It's not called the "Booker of Bookers" for nothing. Brilliant. Magic realism at its best.