If you didn't care before, you're likely not going to be miserable without one now. Still, a center anchors the sound to the centered immage, especially for off-axis listening positions.
At very least, you'll still need latest processing for best sound. Video scaling and switching is also a big plus, room EQ's in the latest pre's are stellar improvements, sonically, etc.
If it were me, I'd be at least adding the above, plus subwoofer. Otherwise, I'd keep a two channel setup like before, and put small quality satalites around the room, and hide a woofer somewhere - and add all the above. Otherwise, inwalls all around, and a quality center speaker for the center, plus all of the above - including 2 channel setup.
To simplify, however, yeah, option one.
At very least, you'll still need latest processing for best sound. Video scaling and switching is also a big plus, room EQ's in the latest pre's are stellar improvements, sonically, etc.
If it were me, I'd be at least adding the above, plus subwoofer. Otherwise, I'd keep a two channel setup like before, and put small quality satalites around the room, and hide a woofer somewhere - and add all the above. Otherwise, inwalls all around, and a quality center speaker for the center, plus all of the above - including 2 channel setup.
To simplify, however, yeah, option one.