At one time or other I've owned almost all the cameras mentioned here (I bought and sold used cameras on the show circuit) and have my favorites. All my M series Leicas are gone, but if I had to have another one back it would be my M2 with 50mm f2.8. I've never owned the smaller Contax cameras so can't comment. I do have the Contax G1 with 28mm, 45mm and 90mm. The G lenses are worth buying the G1 body just to use them. One word covers the G Contax lenses= FANTASTIC! That said, my two favorite stealth cameras with great optics are my Minox 35 Touring and the Rollei 35T already mentioned. I have owned two of the Rollei 35S versions and I really like the "snappy-sharp" Tessar on the 35T better. I've tried three Olympus XA's, one my wife bought me new when they first came out, and I wasn't impressed with any of their lenses. If the XA had a lens as good as the Rollei 35T or Minox It would be the perfect camera bar none, but it doesn't. Here are what I have left in my collection to use. Leica IIIa w/ 50mm f2 Summitar, which is pretty compact, Yashica 35mm GSN, Canon QL17, Minolta 7S, Contax G1, Retina 1a with Ektar lens, Retina IIa 50mm Xenon, Rollei, Minox and Ansco Super Silette w/ 50mm f2 Solagon(outstanding lens). Which camera do I use the most? The Minox 35 Touring. Why? It has a very good lens, is nearly silent and is as small as a pack of smokes used to be. Oh, and it's super light weight also. I like compact cameras cuz you don't mind always having them with you. Also, if it came up missing I could replace it much easier and cheaper than my old M2 and 50mm Elmar.