I second what Dwhitt says. I had a DNA-1 powering my 3.5 maggies with a tube preamp and the sound was outstanding. I have since moved up the McCormack foodchain and have a fully SMC modded DNA-225 powering them. Another great point is that Steve McCormack is a great guy and will answer and help you on any matter concerning his gear. I say grap it and enjoy.
Those of you having experience with Manley Shrimp
I have purchased the Shrimp and am interested in what you are using for power amps. At this point I want to go with a solid state amp, then possibly tubes down the road. A local dealer has a used McCormack DNA-1,comments? But at the moment I am open to suggestions-want to go used-get the best bang for the buck.