System upgrade advice Pioneer SC-LX56 to replace Arcam Alpha10 Dave

I am looking to upgrade my current system which is based on Arcam Alpha10 Dave with Ruark Prologue One, Epilogue Rear, Dialogue Centre and Logrythm Sub as I want to buy a new TV -  looking at the panasonic  TX-P42GT50. To take advantage of the new TV technology I am looking at the Poineer SC-LX56 and not decided which blue ray DVD would match in best.

I would welcome any feedback and especially whether the AV Amp will be a good match for the speakers.