thank you for all the kudos on my post 🙂
but I again emphasize two things : selling the D200 and get a Leica, but most important, take a step back and read.
For example, you did not know what a MP was. If you rushed to buy the M7, you will be lusting for a MP. You could change , but it would take you a few hundreds ( dollars, euros,pounds ), so its better to do it right at first time or try to, rather than cutting corners and do it later at a much very costly option.
I learned this with digital. I was happy with my S2 until I slapped a 17-35 2.8 AFS on it, loaned from a friend. ( this was a few good years ago, 17-55 wasn't even on plans ) It opened my eyes - it seemed a new camera. So instead of buying junk or inferior grade lens to TRY to archive what I wanted , I tried to buy what I really wanted , within limits of course. The 500 F4 L from canon was always a wet dream than a necessity, etc.
So dont rush to buy because you have to. Again, step back ( its the most difficult part ) and think. Take a few shoots more with the D200, see what focal lengths you use the most.
You like the MP ? Fine, use the D200 for a couple of weeks ONLY in manual mode. Did you like it ? No ? Back to the M7/6, they have aperture priority.
For almost a decade, I used aperture priority on my cameras and was a slave of it. Was tough to get out, but now its pure joy : I setup the speed in my brain before I raise the camera and then point and make adjustments. Its just brings a smile when I see that I choose, without a meter, a correct exposure. It was the better cpu of all time : my brain
Again, I think going over a D200 for a MP is a giant step. Can be done, but it requires tough self discipline.
I see that your lens lineup is a 17-55 and 70-200 , both very fine lens in the Nikon camp ( had them both ) but one things "worries" me : they are long.
Ie, 17 * 1.5 = roughly 26mm. Thats close to 28mm , the widest supported in the viewfinder for a Leica M ( wider can be user with optional viewfinders )
Than you have that 70-200, guessing that you use from 120-to-170mm , theres no equivalent in Leica land ( M that is ) for that focal lenght.
Are you sure will be happy with one lens that has no zoom ? 50mm aint a bit shorter ? 75 1.4 is tough to find used and there goes the small camera and lens thingy. 90's are big and fat as well.
My last advice ? Read and read. Use your D200 manually for a couple of weeks and get a cheap 50mm 1.8 Nikkor if you dont have one yourself : precious little gem. Avoid the zooms. Remember, you will have a new zooming option : your feet.
It will force you to interact with the picture, you have to get up and close to take a picture. No more tele with zooms. Go there, ask, can I take a picture or simple smile and take away. Dont chimp. Turn off AF. Manual focus.
If you did not like it, avoid the MP, repeat for next two weeks in aperture mode, but still with the 50mm, AF off and manual focusing. Liked it ? Go to a store say that you will buy a M6 or M7 but would like to take one off for a spin, even just one afternoon. Leave your D200 and VR lens as guarantee and take a M6 for an afternoon. That's what I did when I bought my M7.
Still did not like it ? Stick with digital. No pun intended. RF is a specialized camera , not a "all-types-possible" camera, like a DSLR. Maybe its not for you. Maybe it is.
Just dont jump on it because its a trend or fashion or just curiosity. For that you have much cheaper RF available.
And one last thing : if you do buy a Leica, my last ( ok ok, this time is the last ) advice is to get ONE lens only for the next 6-7 months. Yes, tempting will be to get a couple of lens to get a lineup. But one lens means that you will be more into getting a picture rather than changing lens, wishing that you had another focal length, if the 28 or the 35 are better here, etc. It simplifies things.
All the best in your quest,