Just ordered a pair of Summit X's in dark cherry today...replacing Revel Ultima Studio 2's! Using all Krell EVO set up...402e, 525a, and a 222. Running CAST between components and Transparent Ultra speaker cable. Shunyata Python on the cd and pre...Krell's powercord on the amp. Had the demo today on a near identical system...and was astonished. I had to have them!!