Charles, again thanks for the further info/advice. I'll be sure to check out Audio shark.
Walter, your experience will probably parallel ours in that the DI's are good out of the box and rapidly improve. I did not find these took nearly the time of my VSA VR-33's (those took forever). I'm really looking forward to your comments on your amp/speaker interface.
david_ten, I have read about Decware over the years. I could be way off here but I wonder if the LM gear provides a bit more low end weight and control. It just seems to be a great value and clearly one of the top lines out of China. The Melody AN300b looks like another great choice. Twin 300's in push-pull. Read teajays review. This captured the known attributes of the 300 tube while having impressive extension on both ends all while possessing 3D imaging. Then there's the LTA gear.
The DI's open up a whole new world of lower powered choices I never had with the Magnepans. Yes, this is fun.