Its always good to learn of a fellow New Yorker here. You need space, consider one of the outer boroughs, like Brooklyn
. Below are two examples of homes in Mill Basin, 4,590 and 4,724 sq. ft. each respectively with full finished basement, ideal for a dedicated home theater or 2-channel listening room. Looks like the 'burbs doesn't it ? There is regular express bus service close by that will take you to/from Manhattan in comfort. You don't need to pay an arm and leg for an undersized Manhattan apartment. Okay I'm shutting up now.