Due to a variety of circumstances my pair of Summits have just come out of 10 years of climate controlled storage. After vacuuming and a little warmup time they sound pretty wonderful just like my auditory memory hoped. My question is, has anyone done an upgrade from the Summits to the ESL 13A Expressions and what are experiences and thoughts? Room size is 17'9" L x 15'6" W x 9'6'' H. Primarily 2 channel music but Summits also serve as L/R of 5.1 surround. Thanks.