Welcome, welcome....
In the year 2007, there are only 2 manufacturers on the planet earth still producing RF cameras. One company is called the Leica, while the other is called Cosina (which brand their RF products as Voigtlander & Zeiss Ikon).
Like what Mr Eng Hong mentioned, it all boils down to your budget to start off this RF journey...
To get into RF, it can be as cheap as $200. You can get a russian RF body and match with a OK screw mount lens and you can start shooting. Well, many people have complained about the russians RF not being durable and hang up on you after a while of using, for $80 for a camera body, I won't complain much. What most important to me is the camera can fire at the shutter speed 1/60, 1/125 & 1/250. That's the shutter speed I use most of the time.
If you have a slightly higher budget, say, about $600, then you can try to search for a used Bessa R camera in clubsnap here. Last transaction I saw was $400 for a pretty decent condition Bessa R , which is a screw mount body. In the used camera market, there are a large number of pretty decent screw mount lenses available. Try to get a used Voigtlander 35mm/f2.5 classic for about $250 and the whole setup will only put you back $650. If you have slightly higher budget, you can check out my new 35mm/f2.5 for only S$370.
If you are willing to sell off your DSLR gears, and have a budget of about $1.2K, then things are much rosier... The Bessa R3A or R3M + 40mm/f1.4 is a lethal combination! With this, you can shoot practically anything indoor with a 400 film without flash. The Bessa bodies are very well made, they are the only new RF bodies at sub-1K price you can get in the market today. Infact, it comes out from the same hands and factory that made the Zeiss Ikon and cost half the price.
If you are interested in the Bessas, just give me a PM or ring.
Well, the Leicas are not a bad option, but do bear in mind, as the M bodies or the older screw mounts ones, are pretty "matured", a good CLA is important to get everything back into working order. A whole CLA will probably cost about S$250. After all as what you have mentioned, a light meter is important, so your only option is M6 and above... There is a pretty good price M6 on sale in clubsnap here. If everything is per what described, it's a nice body to start off with! A CV 28mm/f1.9 will get you started as a sharp street shooter. Total price ~2K