My top 3 are: 1) Day/Sequerra Studio/Reference Am excluding the original Sequerra due to it's red lights that show which swithces are engaged. These make it look too busy for me. 2)Yamaha CT7000B Super clean look. Has to have the wood cabinet. 3) SAE Mark Six One of the first, if not the first, with digital readout. On my top three due to way too cool Nixie tubes, and scope doesn't hurt either.