OK here it is.... The Sony is NOT worth it! Yes it may be a good tv BUT it is in a different class. XBR4-5 is Sony TOP OF THE LINE TV. It always has been. It has a refresh rate of 8ms which is TERRIBLE! Look at scenes with fast moving images...It give me a head ache to look at that tv!!!! The Sharp has 4ms and it's well documented! Go to Sonys site and look up any XBR tv and see if you can find the refresh rate on their site. You can't! hmmmm.
I don't own any lcd tvs yet. I have been very disappointed in the advancement of the technology. Don't buy into the "Dynamic Contrast Ratio" numbers, it's all ********! Find out real numbers! As far as I know the Sharp needs to be matched up with the Sony V series. I choose that because of the difference in the 10 bit color gamut. The W and above has the 10 bit which I believe has 64 times more color capability than 8 bit.
So if you compare those models because of that, the Sharp wins HANDS DOWN!!!!!
If you insist on comparing the XBR4 to the Sharp 46d64u then look at these specs...
resolution - both-1080p
contrast - both-2000:1(each man. has its own dyn contrast IGNORE THEM BOTH!)
brightness - sony not given-sharp 450
response time - sony 8ms-sharp 4ms
120hz-sony has this sharp does not(does this really matter? does it mean that sonys
panels are better and that the 8ms rt is good enough? NO!)
10 bit color-sony has it sharp does not(sony can produce more colors but to what disadvantage?)
Price----
Sony - on average online is about 2200 to 2600
Sharp- about 1600 to 2200
Now if you take the average price and do the math.....
I decided to use be$tbuy.c0ms prices.....Each tv can be found much cheaper through other means but its an example
Sony-2999
Sharp-1899
Thats about 1100 difference. Is it worth it? I really don't think so. One of the biggest problems with LCD technology is how fast an image can be displayed. This technology is GREAT for computers like the office environment. But for MOVING images it is not. That doesn't mean its terrible, its just not the perfect tech for MOVING IMAGES!
For example....why is 1080P P P P so popular now? why is it one of the new techs???? Because it is replacing the INTERLACED display method. We are moving from interlaced display tech(crts) to progressive display techs(720,1080P etc.) But why???? BECAUSE IT'S MORE SMOOTH FOR THE HUMNAN EYE TO WATCH. It's better, smoother, faster, more natural etc. So why invest in technology that is WORSE that your old crt tv?????
For example....I know another one.....My "old" sony high def super fine pitch 1080i tube tv is better than ANYTHING in the world available to consumers. This has nothing to do with the fact that it's mine. The reason is completely technical! The ONLY thing as far as I know, (power issue aside because I really don't think the majority of people give a rats ass about power consumption) that is better about todays tvs is that they are progressive scan tvs. tube tvs are better at contrast ration by millions of times.....refresh rate is speed of light fast etc....
Do we have a choice anymore? NO and that such BUT I understand newer tech is growing and becoming better. LCD is also becoming better much in the last few years. But now what we are seeing is manufacturers not improving the basic tech but masking it with dynamic contrast and 120hz refresh rates. The BASIC tech needs to improve.
Holy **** this is long....sorry....bottom line....go with the Sharp. The Sony may be able to produce more colors and look more vivid, but motion on the Sony is terrible! This is one of the MOST important specs of lcd tech. How fast can the machine display an image and then change to another image. The sony does it very slowly. 8ms was something computer monitors have been doing for years.
Don't go saying computers monitors are different because they are not. An lcd is an lcd! PERIOD! Dont get me started on the the physical resolution of these big tvs....some of them are still at 1368x768 LUDICRIS!!!! is that spelled right?
Anyways....buy the sharp from new3gg or something for around 1600....use it for 3 years or so.....buy a new oled that will have a million:1(thats what they are now,today) contrast or whatever it is by then and be happy!

i believe all my data is accurate but let me know if something is wrong!!