Both have the same level of build quality and have wonderful reputations. To answer your question you need to tell us what speakers you are using? The Krells are more in your face and the ML's are more layed back or dark in some people's opinion. If you have a speaker that's a little analytical in its presentation the Krell might be too bright. I own Thiel 3.6s and a Krell KSA200s. Its a wonderful combination since the Thiels are very low impedence and would sound a little harsh with the MLs. The reason is the Krells have slightly more power at lower impedences. I think you get a bit more power for the dollar with the Krells, and slightly better resale value with the MLs.
