Have also been thinking about trying a Benz and so far it seems like info / shared insights / reviews are few and far between. Have read or been told the following, which may or may not be true; Their is a nice jump in quality when you step up to the first level wood body cart(L2/H2/M2). As you go beyond this level some folks have not been happy with the results of upgrades due to trade offs in warmth vs detail & and as usual, gains in the higher levels are more incremental and may or may not represent acceptable value to a particular individual. Higher output voltage carts are reported to sound as good as the lower output carts.
Again, don't know if any of the above is true, food for thought.