Personally. i would remove the lower of the two shelves on the left and right as required and put the speakers in those spaces; I assume that is what you had in mind.
The KEF Q300 is exactly what I would have recommended, even if you hadn't mentioned them.
They are WAAAAYY better-sounding speakers than the Polks you have...lol. You will like them a lot.
I think I would go with a 2.1 system (or 4.1) and forget the center speaker, which will be too low. Those speakers won't be far enough apart to need one anyway.
A SONY KDF60R550A TV will fit in there perfectly. I just bought one and it is superb in every respect and only cost $1400 from Amazon. It even has good sound (good enough for a lot of routine viewing) if you don't want to turn on the sound system. It also has an analog audio output jack which can be set for a fixed or variable stereo sound output to your amp/receiver, and an optical audio output for more channels.
I use a NHT B12D subwoofer, which comes in a beautiful piano black finish and looks really nice; highly recommended as a decor upgrade and also a sonic upgrade. It is a really excellent sub.
You don't need to do anything with the cabinet where the speakers are going to be; the front-porting eliminates any problem there. Just make sure the front of the speakers protrude out in front of the cabinet to either side very slightly to avoid reflections/diffraction of sound.
The KEF Q300 is exactly what I would have recommended, even if you hadn't mentioned them.
They are WAAAAYY better-sounding speakers than the Polks you have...lol. You will like them a lot.
I think I would go with a 2.1 system (or 4.1) and forget the center speaker, which will be too low. Those speakers won't be far enough apart to need one anyway.
A SONY KDF60R550A TV will fit in there perfectly. I just bought one and it is superb in every respect and only cost $1400 from Amazon. It even has good sound (good enough for a lot of routine viewing) if you don't want to turn on the sound system. It also has an analog audio output jack which can be set for a fixed or variable stereo sound output to your amp/receiver, and an optical audio output for more channels.
I use a NHT B12D subwoofer, which comes in a beautiful piano black finish and looks really nice; highly recommended as a decor upgrade and also a sonic upgrade. It is a really excellent sub.
You don't need to do anything with the cabinet where the speakers are going to be; the front-porting eliminates any problem there. Just make sure the front of the speakers protrude out in front of the cabinet to either side very slightly to avoid reflections/diffraction of sound.
