I like the GWII. It has a bigger screen. The picture is possibly a bit better on the DLP but the rainbows pretty much eliminate that technology for me. If you don't know about rainbows search this site as it has been discussed in great detail.
I am going with the Sammy because the black levels on the GWII are not to my liking.
Really, though, they are both great sets. Figure out what your priorities are (what material you watch, computer monitor use or not, light conditions in the viewing room, mostly DVDs, mostly video games, etc.) and then use the search function - there are a million threads comparing the two.
Good luck, and you will probably be happy either way, especially if you wait for the GWIIIs which will list for $1000 less...
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