As promised:

Sony: No plasma, 40" LCD QAR 12,000 USD 3300 GBP 1790

Samsung 40" LCD, QAR 9,750-10,150 USD 2680 - 2790 GBP 1455 - 1515 (3 models)
Samsung Plasma 42" QAR 6550 and 7550 USD 1800 and 2080 GBP 980 and 1130
Samsung Plasma 50" QAR 18,550 USD 5100 GBP 2770
Samsung Plasma 63" QAR 41,000 USD 11265 GBP 6120

Panasonic, no LCD over 32"
Panasonic Plasma 42" QAR 7150 - 11450 USD 1965 - 3145 GBP 1070 - 1710
Panasonic Plasma 50" QAR 18,150 USD 4990 GBP 2715
Panasonic Plasma 65" QAR 42,000 USD 11,540 GBP 6275