You mean sir that the LCD2 is no good in any level against your senn650. How bad is it? Are they not in anyway much superior according to many reviews and rank by many as likable headphone because of the sound quality that they produce. What is that made you despise your rev2.?
I second odo1n's opinion to me at least the LCD2's are a slight upgrade over the 650 but it is not a night and day difference sort of upgrade. To my ears at least the LCD2's regardless of revision have more or less the amount of advantages/disadvantages compared to the 650's. The 650's are more comfortable they have a more relaxing sound. The 650 is one of the few headphones besides the 800 that scale really well with the amplification you throw at it. Due to the amount of baffle dampening used in the LCD2's driver, that very laid-back sound will always be laid back as there is nothing that can be done, be it eq, mods or amplification to bring the sound sig more forward, it's just the way it is designed.