I had Great Northern Sound update my Audio Research preamp.The job that was done was utterly spectacular.Meticulous attention to detail and performance that shocked,so much so that a friend immediately had the same work done.Not cheap,but,worth every cent.Thus,I would not hesitate to have the 861 work done.GNS is not a sales oriented operation.They are result oriented.Also,the diff. between the 861 and the 861se is in the transport.When you get to this level of performance(all units mentioned are superb)to actually agonize over the differences between this level of componentry is absurd.Not that there are not differences,but,it is more like saying Angelina Jolie is better looking than Charlize Theron.Rediculous!By the way,Nicole Kiddman owns the Levinson 390s.Just as good,and a bit less expensive,though,not cheap.