Need comments on the Magnum Dynalab MD-90 FM Tuner

In the current issue of The Absolute Sound Magazine, they said good things about the Magnum Dynalab MD-90 FM Stereo Tuner. What are your comments regarding the MD-90? Is the tube output section option worth the extra $500? I am also looking at a used McIntosh MR510 FM Tuner and the MR77. My tuner budget is under $1,000 and I need FM only. Thanks..