compare hdtv televisions

Which TV is better out of these two?
1st: http://www.bestbuy.com/site/olspage.jsp?skuId=7631226&type=product&productCategoryId=pcmcat95100050007&id=1130986501338
2nd:
http://www.bestbuy.com/site/olspage.jsp?skuId=8250135&type=product&productCategoryId=pcmcat95100050007&id=1169512290309
Is Sharp a better picture then Samsung?
Do I get more viewing area with Flat-Screen?
I'm mostly going to be watching DVDs in a dark room
Also other questions:
How long do normal Tube televisions last (like the two up there)
How long do HDTV Tube televisions last (someone told me not much compared to old ones)
As personal preference, I prefer Samsung. Now, about the life expectancy of an HDTV? There really is no record of info. for this, at this time. I subscribe to Consumer Reports. org and this is where I research all information about products that I plan to purchase. This is a really useful subscription when you're looking for a reliable source of information. Samsung out-performed in every category, so I decided to purchase one. It's hard for me to ever imagine viewing TV or DVD on another when the quality of picture is absolutely phenomenal in every aspect. Samsung has the best repair record, that is, they have to repair the least out of all other HDTV's. Consumer Reports also states that HDTV's haven't been around long enough in order to generate an accurate life expectancy, but so far have done exceptionally well.
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