Unfortunately the sub ain't gonna happen. She has plans for the only area it could go and there isn't enough room for it in the center rack.
I'm not asking for necessarily something to meet or exceed this setup... just something else to consider that would be second and third best. If Ascend didn't exist or if they go out of business before I buy...

... what would you (or anyone else) choose. If that company didn't exist, what would the third choice be?
I like options.
