At over $5,000.00, with tax, I don't think it's unreasonable to expect the same quality of design and hardware as the 6300,6500 and current, 6700.
(I'm using my soon, I hope, to arrive 6600M as a price example)
One of the things I like about the 6000 series is the heavy duty well made cases. The new 120Mm fans and larger heat sinks are great news! More air flow at low rpm’s & lager heat sinks = Quieter and more efficient heat dissipation than the prior models.I agree with some of the other comments, When you are building one of the best performing radios on the market why would you cheese out on the case? I am so I glad to hear the new radios cases will be the same high quality as the prior models.
Yes Rackmount kit for all models 6400/6600 & "M" models as well. Please:)