ARC has experienced high failure rates on the Russian 6922. In addition ARC is having problems with the factory. I own both the ARC LS25 and the VT100 mkII. I am not in a hurry to upgrade to the LS25 mkII or the VT 100 mkII. Leonard at ARC claims that the LS25 mkII wallops the LS25 mkI in every respect and is in fact clearly better than the Reference I. I guess we will see.......
