Having researched TVs for many weeks online and in showrooms and monitoring prices all the way, I finally took the plunge and bought the 42XV635DB online from John Lewis for £649 (inc. delivery and the all-important 5yr warranty). They were out of stock for a while and I nearly made do with my second choice of DigitalDirect @ £615 (inc. delivery and 3yr warranty). That £615 price by the way, takes into account the £100 cashback offer from Toshiba that ends on Nov 11th (Details here:
Toshiba LCD TV Cashback) Note that only the listed sellers are participating in the £100 cashback offer.
Anyhoo, the TVs finally came back into stock at John Lewis and I really wanted the 5yr warranty, so job's a good'un. I suspect that the only models that'll have a sale price over christmas will be ones that aren't selling well and/or ones about to be superceded. I don't see the 42XV635 coming down in price anytime soon (perhaps feb/mar/apr at a guess) because it's a really good model for the price and it's selling well (out of stock in many places, high street and online) and I don't think it's that old.
I wanted this model in particular so I didn't want to get into the situation where I was banking on it coming down in price and then finding it didn't and there was no stock left at my preferred sellers, so then I'd have to pay more at somewhere that did have stock and pay more again for the extanded warranty. I suppose it depends on your own circumstances doesn't it - how badly you want this particular model, how long can you wait to get it, what value you put on a good warranty etc. Prices will always eventually come down but how long will it take?