I prefer the Google TV UI over the LG webOS UI and not a fan of the LG magic remote either.
The built-in speakers of the 55 A80J include woofers and sound pretty impressive and you won't need to get separate soundbar unless you really want louder sound or deeper bass.
I have connected my Tata DTH set top box to it and you can operate it using the Sony remote itself.
Another plus point is the included table stand which has 3 positions....standard wide position, a raised level position to accomodate center speaker or soundbar and a narrow position for smaller table which is what I needed.
Thanks. Will be setting up a HT, so sound is not a concern. Has to be wall mounted and cannot go larger than 55 inches. Hope the Picture quality, blacks, contrast etc are good.