I have HLN617W for a week now, and one of the reasons to go with DLP was to be able to use the set in a very bright day light settings in our Family room. The PQ is good for regular cable, and better for SD and HD. For the reference, it looks about the same PQ compared to 27" Sony we had in the same room. At night, PQ matches for regular cable PQ on 27" set, as far as our subjective observation can conclude. Of course, it is a lot better for HD.
I'm with mnilan, the worst performers in a brightly lit room are Front projection and CRT based RPTV's. I use my HLM507 in my living room with the lights on and it looks similar in brightness to an old CRT television.
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