I owned the hls6188 for 2 weeks and had major issues with the sceen, light engine, etc. If I had to choose, I would definately go with the HLT6189S over the HLS6188. The frame around the screen is much sturdier than the HLS series. No smudges :-), colors are very vibrant. Contrast is 100% better than last years LED sets.
Only menu items I changed is putting it in Movie Mode. Too late to fiddle with the other settings so that will just wait.
After a few movies, HD Sat, DVD, etc, I woulds say this is a very solid set OTB. Of course, I will get the full skinny when I get this calibrated (which will be the week of 4/16).
PS. Don't get me wrong on the HLS 6188. It is a very accurate set professionally calibrated. If you can get the HLT6189S to within a few hundred $ of the HLS, swap it for the LED. You will get that back with the savings from the LED technology.
Sony XBR-65A1E, XBR-55A1E, Marantz AV8805, AV7704
Naim SN2, Hi-Cap DR, ND5XS2, Naim Unity Core, Emotiva XPA-9, A-5175
Dynaudio Contour 30, Focus 210C, IC17, S4-W80, Emit 10, 2X JTR S1, SVS SB-2000
Panasonic UBD-820, Bluesound Node 2i, Ansuz Mainz C2 Power Distribution,X Power and speaker cables