Power City & DID are currently engaged in a price war. You may be able to play one off against another.
I was in Power City and was trying to decide between a Philips 26" at 449 and and Samsung 26" at 499. They, for me, had the best picture quality across the ones on display. DID had the same Philips for 439, so I bought that one. I could have gone back to Power City to see if they could beat it, but it wasn't worth it to me to get another €10 or so off the 439.
BTW, the one from Laptops Direct is listed as being a 26A457, whereas the one on display in Power City is, unless I write it down wrong, a 26A451. I don't if, or how, they are different TVs.