This package hit more than 1200 degrees last week when sold by John Lewis for £574. Admittedly, this deal doesn't doesn't include the JL 5-year guarantee, but JL are out of stock at the moment. Also this allows you to enter the draw with a 1-in-5 chance of winning a Sony PS4, which ends on Sunday 13th July.
To get the £555.84 price you need to use a code (sale4) which gives 4% discount. There is also a possible 4% cashback from Quidco, which would take the price down to £533.60.
If a 5-year guarantee is important to you and you live near a Richer Sounds store, they are offering the package with the choice of a "free" soundbar or BluRay player for £579 (but to in-store shoppers only).