Hi, I have a Toshiba 42" RPTV. And although the sound is good, apart from the slight hissing from the rear speakers and a woofer that keeps switching itself off and back on again when all the action has finished. Will using either the pioneer dcs303 or the sony dav550 improve the audio quality. Then which to buy, I like the look of the sony and at £299.99 for the multi region it's only £30 more expensive than the pioneer. But which do you think is best? Thanks for any help.