Hmm... I guess the cables are too exotic...
I'll agree with both of the above posts. I would go with the Mk I if you have electronics that are slightly on the lean or bright side. For a little more accuracy and neutrality, the Mk. II is the way to go. The Mk I's are going cheap for $200-250.00, so this might help in deciding if your budget is tight.If you go with the Mk I,try to find a Mk I with the white teflon insulation. This is a little better than the earlier versions with the clear insulation.