I have a 106" diag carada BW with my RS2 and really enjoy the combo. When I got my rs1 I was using the da-lite HCCV and then I got the Carada BW. The black level didn't seem to change much and the image had more depth with more accurate representation of colours (ie white) and of course the image was a bit brighter...what more could one ask for?
I'm at 125 hours on my RS2 and still have the same level of enthusiasm. If anything, it looks even better now since the black level is darker from the bulb aging. I watched i,robot recently and the image was stunning.
Oh and someone before asked about gaming on the rs2- I have a ps3 and xbox360 hooked up to it and games look incredible on it. I've been playing a lot of Rainbow Six: Vegas 2 on the 360 and am really impressed with how it looks on the RS2. The casino level in terrorist hunt makes me pause playing at the start because I am that impressed with how good it looks.
While not seeing every pj out there, I have got to think the rs2 is one of the most complete units you can get. Great black level, great shadow detail, great detail/very good sharpness (my RS2 is pretty sharp and clearly sharper than my old RS1, simple as that...maybe others aren't that sharp but mine is), good depth in bright scenes (something the rs2 clearly improves on from the rs1), pretty good brightness, etc and a good price for what you get compared to other great PJs like the 11S2 which costs what, almost double yet will still have inferior low apl performance. The RS2 isn't perfect and isn't tops in every area but I think overall it is a pretty damn good product especially with the added depth in bright scenes which was somewhat lacking in the rs1 and with the extra detail it can produce which again, the rs1 couldn't achieve. I think that there are probably many people out there who would discount the rs2 as simply an rs1 with a higher on/off but the fact of the matter is that it is much more than that and clearly fills some of the shortcomings that the rs1 had. That the RS2 improvements exceeded my expectations (I went in expecting better black, and a bit more depth) IMO says alot about how good this machine is. I know the colour issue is its biggest weakness but IMO the oversaturation just simply isn't a big issue most of the time as things still look natural...again, at least on mine.
I was very close to getting the 1S2 and am glad I talked myself out of it and went with the rs2 because the 4-6k saved is worth more than whatever improvement the 11s2 may have in some scenes. What I mean is that the rs2 satisfies me enough in the various PQ areas that MY expectation for what an extra 4-6k more over the rs2 should provide performance wise is simply not do-able yet in a digital pj.