Well, the country list is far from finalized or complete. I have been to Thailand half a dozen times, toured Cambodia with my daughter a few years ago, motorcycled through Laos on a Honda 250, took my daughter to Taiwan and Hong Kong two years ago at Xmas, and the only country on my list that I have not visited in SE Asia is Vietnam.
Overland from Singapore to Bangkok is something I have been wanting to do for years and India is also on my list (spent a month in Nepal and suspect it is similar). Funny but the only time I have ever had any type of traveler's stomach was not in Asia but in Guatemala after eating something from a sidewalk vender during Semana Santa.
After India I am giving serious thought to Israel and Jordan. I am not the slightest bit religious but just from a historical perspective Jerusalem is a must and Petra has fascinated me for years (INDIANA JONES AND THE LAST CRUSADE, anyone).
And even though my daughter and I spent 90 days in Europe four years ago and my recent vacations have been to Scotland and England, there is a lot of Europe I have yet to visit, especially France, Germany, Austria and Netherlands. I think I may fly into Rome from Israel and use the trains to explore Europe. Florence was one of my favorite Italian cities on our trip four years ago.
I am trying to travel with just one carry on and a small camera bag. Since I will be starting the trip on the equator, I may have to purchase winter clothing in Europe since my rough schedule puts me there in December. I would rather do that then lug warm clothing through Asia and India.
I just received a 11.5" Lenovo for the trip on the recommendation of a friend who is a computer nerd. I also purchased a mint FujiX100F planning to use it as a backup. However, it is so good I may leave the MP240 at home.
I know from threads here that people debate carrying a $6000(or more) Leica on travel but I keep thinking why do I own it if I am not going to use it. Presently, I am thinking MP240 with 25/50/90 and the X100F. I have changed the lens combo to include a 50 vice a 35 since the X100F has that focal length covered. I have shot with the original X100 on several trips and loved it (size, freedom, IQ, and ease of use). Both the X100 and MP240 kit will fit in a Billingham Hadley Small and the Leica can always remain at the hotel but I would rather have it along then not. I plan on writing and photographing a blog as I move around the world. And it might contain some rather politically incorrect observations about current events.
Anyway, that is the evolving plan. Hope to leave the US in the last half of September for Japan and Asia. Keep the comments coming as I am sure there are things I am overlooking.
when I read 4 to 6 months and all the countries you mentioned you consider to cover in that time my first though had been, I admit: "oh my, that will be a rushed journey where one only can scratch the surface of places, not even that, only rush through some tourist sites"
Now I read that you have been to many places in Asia already, and maybe it's just different styles anyway. Still, imo for India alone, in 4 to 6 months, one can only see that much. It's kind of a continent in itself, from highest, remote mountain peaks to desserts to sandy beaches, tribal areas, old and lost kingdoms asf. asf. I know the place just a bit, after touring it, total in my life, for some 5(+) years. There are quite a few places that are still on my list that I haven't seen yet, others that I'd want to go back, by now after years..
For only a rel. short visit I may be able to give some advice but first would need ask, what is that you would be looking for, what is it you wanted to see?
Japan is a most unique and beautiful country too!
So is Vietnam.
If you do make it to Austria, ktmrider, there is a Museum dedicated to KTM, the motorcycle manufacturer, due to open, if I understand right, in a few days or weeks, during this coming month April in the very place of it's original manufacturing, Mattighofen:
http://www.hlw-architekten.at/projekt/ktm-museum-in-mattighofen/
personally I would not keep that 25mm home, or even substitute it with a 21mm. On my travels the majority of photos are taken with a Voigtlander Heliar 15mm on APS-C sensor, that is @ abt. 21.5mm equivalent. Your X100F sure is a great camera, again I would want it wider than 35mm, even over the Ricoh GR with 28mm, as a backup, I'd rather choose a Sony RX100iii or newer for it's nice 24-70mm zoom range and general versatility, EVF, tiltable LCD, builtin flash, smaller body size. That Lenovo you got is just about the kind of machine that I would have suggested, congrats!