Hi Guys, i need some advise, currently running a Rotel RSX1560 receiver and I not sure if i should add a power amp or not, is the power on the RSX1560 enough? 7x100 watts into 8ohms, speaker setup Jamo C97 fronts, Jamo J110 sub with Jamo C9 centre and B&W 686 bookshelfs as rears.