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I have serious doubts that the cheaper tires can maintain proper roundness so that the "M/B suspension does not feel the out of round condition. "
Only tire I have ever owned that developed a 'lump' was a michelin.
I recommend Bridgestone Turanza. Cheaper, and is a better tire in my MB (4 cars, 200K miles) experience.
It is what I have on my SE, after 6 years of Michelin. Much better in every way, including price.
If you don't want to take my recommendation, listen to what the Tirerack professional says.