Those seats must be very interesting conversation pieces, no?
Yes they are! I think they even catch more attention than my LCD or DVD collection. My boss was very impressed, when we had our house blessing.
Your TV and AVR are already very good, so if you're going to upgrade, speakers na lang --- try floorstanders pag nagsawa ka na sa bookshelf.
My old setup was an Onkyo 595, in tandem with the Mordaunt Short 5.1 set (Premiere MS 3 series). Sobrang detalye ang naririnig ko with that setup, I loved it! When I was building a new house, I wanted to pre-wire it for a 7.1 setup, so I sold my old gear. Now, with the Yamaha659+Diamond9 setup, kulang na kulang na ang details. I don't know tuloy who's at fault, kung AVR or kung speakers.
My gauge is my all-time favorite Corrs Unplugged DVD. When Andrea breaths in when playing her black flute-like instrument, dinig na dinig ko each and every breath she takes (sa old setup ko). Now when I play that same disc on my new setup, wala na yung breathing sound.
Pati yung Mordaunt Short ko na sub, Premiere 308W, talong talo ang Wharf SW150 ko ngayon. Down-firing yung 308W, and I remember having to lower the bass down, kasi yumayanig parati yung buong sala ko. Ngayon, bitin ako sa bass nung SW150. Parang meron ugong lang, but lacks the punch! Hanap muna siguro ako ng cheap 2nd hand 308W uli, and do a 7.2 setup. Kung bitin talaga, then maybe a 12" Velo would be worth considering. Ang mahal lang. :'(