I just picked it up at Costco today (5/12/2009) for $499. It was the shelf model, but it came with everything and the standard Costco 2yr warranty. I couldn't pass it up.
I've only played with it for the last hour or so, but I must say that I'm really impressed so far.
The standard def actually looks really good (for what it is). I was expecting it to look terrible, from what everyone says about high def tvs and standard def channels.
The sound is also really strong and clear. The manual (which you can download off the Westinghouse site) actually specifies 2x15w speakers and not 2x10w like the spec page shows. You can tell too. at only 25% of volume, it's plenty loud with good bass reproduction. Good enough for tv, that's for sure. If you're doing dvd movies then you should have a surround system anyway.
I really like the depth the menu allows for configuration. You can get down to individual color levels for each color temp preset. Has a skin tone setting. Separate black and white level settings, etc. Seems really deep for an inexpensive tv.
I haven't had a chance to test it with my laptop (dvi-hdmi), but I'll give feedback when I get a chance.
UPDATE: I tested my laptop w/ geforce 7600GS using a dvi-hdmi adapter and a hdmi cable. The pic came up instantly but at the laptop resolution. I changed the laptop to output to 1920 x 1080, and it looks good. Now, the settings in the nvidia tool are the key to getting it to frame right. The color is too intense by default, so I'll need to play with that more, but so far, so good. Haven't noticed a ghosting issue.
I haven't noticed a problem with the contrast levels. I can see detail in the shadows very well on 1080i or 720p tv broadcast. Haven't tried hi def movies yet. I wouldn't be surprised if the contrast level is erroneously listed, just like the HDMI ports (actually 4 and not just 2) and the speakers. The manual lists 4 HDMI and 2x15W speakers but doesn't have a spec listing for the contrast ratio.
My ONLY concern with the set so far is the color shift that happens when you are more than 30 degrees off center. It's noticeable, but doesn't ruin the tv for me. The screen is still very clear and perfectly visible off center; just a hair less intense/deep with the colors. Well, and sound leveling would be nice...
The system info for my set says March 25 2009 v5710_1.9.0, so the firmware is pretty recent.
I also found this CNET review for the VK-40F580D (integrated DVD player). In the review, he said the black reproduction was actually very good, not as deep as some, but very good. And this set only has a 1800:1 contrast ratio. And the TX series of Westinghous TVs only has about 1000:1 ratio until the newest models . By that measure, this VK-42F240S might do well ... if CNET would ever review it.CNET Review