My only complaint with the M-80/V-80 is after a while they start to pinch on my ears. I wear Shuron Ronsir glasses (think Vince Lombardi's glasses), and the thick earpieces get stuck in the middle. Such is the price I pay for looking retro.
From what I've heard, the V-100s are expected to cover the middle ground between the LP2 and the M80. Bassier than the M80, but closer in size to the LP2. I'd love to see what I'd call the M90. The M80 sound in the LP size.