Should I change my Pioneer 4280 Kuro series?

[raf_gti]

I've my Pioneer for four years now and generally I'm delighted with it, however recently I've found myself considering a possible upgrade.

With Pioneer out the market are Panasonic now the benchmark?

A quick look at John Lewis throws up http://www.johnlewis.com/231338101/Product.aspx

More inches and 1080p are appealing, 3D is something I can live without.

thanks!