There are seperate threads for the 542i, the LT model and the 232v, why not a thread for the 337H owners out there? Ive had a chance to play with my set a lot now, i have comcast cable with a motorola 6412 III hooked up through an HDMI cable (also hooked up through component cables, picture is much much less pixelated using HDMI, however a static picture is sharper/clearler using Component).
Out of the box i bumped the contrast up 3-4 clicks, i have the sharpness at about 80% for component and 40% for HDMI (the sharpness settings make an enormous difference between the two sources). Lighting is on "Bright Room," color temp is Native (this is where the 3 series and the DNX processor has an advantage over the 5 series, the color that you get from the native setting with the dnx chip is nearly perfect, there is almost no need for any further fine tuning). I have the noise reduction on High (neither i nor the comcast technician have noticed any difference between having this setting on High or on Off). Through comcast, 1080i looks much better on this TV than 720p. I would only suggest switching to 720p when you are going to watch an entire sporting event on FOX, ESPN or ABC. Other than that, stick with 1080i. Hopefully comcast designs a pass through option in the future. I have the 4:3 override set to 480P, DO NOT set your set to 480p override if you are using component cables, the pixelation is horrid on SD. HDMI cables really clean this up a lot. If you have a DVR, pause a SD program in motion and go back and forth between the HDMI and Component inputs, it is night and day. Note: i have found that in order to view comcast on demand HD programs, you must set the 4:3 override to OFF, regardless of which cables you use.
720p looks stunnning in blu-ray and for ps3 games. Do not attempt to set your Blu-Ray or HD DVD player to 1080i, 720p is clearly the best setting on the 337H.
That's about all i have for now!