I've been given the opportunity to test drive the SL for the next two weeks, and compare it to the Monochrom 246. I'm heading to New Mexico tomorrow for two weeks, so it will be the perfect opportunity.
One of the reasons why I am considering the switch is the ease with which the SL focuses the 0.95 Noctilux (even with a brief test at home it's better than the Monochrom). Here again, I'm just testing the waters, and these next two weeks will help determine if I am going to make the move or not. I can keep one or the other - not both.
Part of the arrangement is that I write a blog post on my dealer's website (Sam Shoshan/Classic Connection), and post comparison photos.
Gotta say, for the few hours that I've had it so far, it's a heck of a camera. The body is like the T (made from a solid block of aluminum), and it definitely feels quality (it's about 90 or so grams heavier than the Monochrom 246). Feels really nice, and the EVF is great. I'm sure it has more features than I will ever need, but I'll be definitely familiarizing myself with the camera (and the 130 page instruction manual!) on my four-hour flight.