Welcome to RFF. I looked at your flicker shots and they are great. You are miles ahead of the usual new-to-RF person (you understand photography and people) so you have a lot of options opened up to you.
Lowest Cost of Entry ($350)
Get a Bessa L used (or two for that matter) and put a CV 25/4 with finder on it. This is my favorite carry camera and lens combo. Unlike the 24/2.8 Nikkor that I grew up with, this lens rocks as a people lens (environmental shots). No RF coupling, you guess the distance, but I’ve only had two pictures in hundreds where I screwed this up (your mileage may vary but I doubt it). The L has a built in light meter and LEDs on the top back so you can adjust exposure and focus as you bring the camera to your eye. The L should cost some where between 75 and 90 for a good one, some times less. You can get the lens new (LTM has been discontinued, the M mount is about a month away, but does not come with a finder) at CameraQuest and other places too (I think). I find this combo actually very fast to use.
Medium Cost of Entry ($400)
Get a combo CV Bessa R & 35/2.5 kit. This is a great place to start with a built in finder/rangefinder combo, light meter, etc. While the R is not a ROBUST camera, it is well made and well understood by many users. I have one on loan to my son to start with in photography. This is a great little kit.
Higher Cost of Entry ($700-800)
Bessa R2 (a green (not as ugly as you might think) one is availed at
www.cameraquest.com it looks like) and a faster lens, the 40/1.4. You can use the 35mm frame lines or 50mm, depending upon your preference (do you fill the frame or do you want some edge to crop?). Like most of the CV glass, this lens rocks. It is fast, small and gives great images. The R2 is an M mount camera, you can use LTM (aka Leica Screw Mount) lenses on them with an adapter. It is slightly better built than the R and takes a winder ($160 or so new), IMHO, the best Bessa accessory there is. I have changed to a 40/1.4 as my standard lens that I carry on my M6 and it is right at home there.
You can go with older cameras, there are many great ones made that are in your price range. The Canon P, Nikon S2, Leica M2 are several examples. Even an Leica IIIc is a fine place to start.
I switched to Bessa when I had kids and did not want to carry my Leicas till they were older. I tried an OM-1, but it was not as pocketable as I wanted. I went with a Bessa T because it had a built in meter and took M lenses. I knew I could buy almost any LTM lenses and put an adapter on it to use it on the T or on my M6. It felt like a better decision. The T is a great camera, has a built in range finder, but no viewfinder. You need to use external ones. This worked fine for me for many years, now I am moving back to my Leicas (kids are 9 and 10). Cosina has built a fine set of cameras for the money. They are not Leicas, but they are a great way to get into RF.
Take a look at
www.cameraquest.com. Stephen Gandy is the new owner of this site and has been running cameraquest for years. You will find him among the most honest folks selling anything anywhere (IMHO and the same of many others). There is a ton of great info there on CV products and Leicas, Canons and Nikons.
I love my L/25 combo and I bet you will to.
Good luck, welcome, keep asking questions, we all learn that way and let us know what you decide and how you make out.
B2 (;->