Hi, I really need your help. Which is better? Bohlender Graebener Radia 520i's or Martin Logan Ascents? I would be buying either set used. Radia set is about $300 more, but newer. I don't care about the bass but I want really good midrange and high sound with good soundstage. I have an entry level set of BG radia and like them. They come with a lifetime warranty but so many people like the Martin Logans and so I need to decide. Is there any maintenence required for the ML's? I notice some on Ebay with rebuit panels. I need to know by tomorrow. THanks!!