We did a shootout the other night between the 5700 and the 7200. We used both PJ's with a Panny RP-91 DVD player, A Bravo D1 DVD player and Comcast Hi-def feed on a Motorola DCT-5100 cable box.
The screen is a 16:9 matte white 137" diag. and viewing distance was roughly 16-18 feet.
The 5700 did better in DVD and looked great with the both players but the D1 had a VERY slight advantage. The 7200 could show more detail in Hi-def but the 5700 was impressive as well. At 137" you can see pixelization on the 5700 at our viewing distance. BTW, surprisingly the 7200 looked better with the RP-91 than the D1. The 5700 looked better than the 7200 in DVD no matter which player we used.
I would suggest 100" or under screen size with the 5700. The 5700 has enough brightness to go bigger but the limiting factor is the resolution. At 100" it was tough to tell the difference between the 2 PJ's. The colors and brightness is similar between the 2 PJ's.
The projector is bright with vibrant colors and definitely has a WOW factor. It's absolute black is not as good as some other PJ's but CR is very good.
There were 3 people at the shootout not counting our wives which have seen many PJ's as well. My business partner and myself which are both ISF calibrators and calibrate a lot of PJ's. The third gentleman is an enthusiast which has seen a great number of PJ's. All 3 of us have also seen the HT-1000 and although it has better absolute black none of us would choose it over the 5700.
When I was doing some testing of the 5700 at my house on a 16:9 92" diag matt white screen. My wife humored me and joined me to give it a look. I have a number of PJ's in the house and I am always testing new ones so she humors me quite a bit and is not a newbie to PJ's. Current PJ's in the house: Piano 3100, Panny 300, X1, Electrohome CRT and 5700.
We started viewing various discs that I use for reference materials, TFE, Casablanca, Citzen Kane, Shrek, Shawshank Redemtion, Dances with Wolves, Sweetest Thing, U-571, Apollo 13, VE montages, DVE montages and HALO on Xbox.
During the viewing I didn't ask her opinion but she kept saying 'WOW' and 'Amazing'. At the end she said this is the best PJ she had viewed. She said she couldn't believe how amazing the colors were. I asked her if she wanted to compare against any of the others and she said "Why bother, It's better period."
My personal opinion is that this PJ is so bright and on my relatively small screen its WOW factor blew my wife away. It is not the best picture I've seen but I can't think of anything in its price range that hands down beats it. I haven't seen the Runco CL-510 yet. I generally prefer the Runcos for accuracy but not necessairly WOW factor. I will also get a Sharp 200 to compare when they are available.
Hope this helps.