3.

That way, if you change your mind, it will be easier to add more bookcases.

I like the idea/1st picture.

Also 3.

I nearly made the mistake of planning a major piece of casework large enough to fit a tube TV. I ended up leaving the TV part out... By the time I was done with the actual cabinets, flat TVs had become of fraction of the price they were when I was started the design. Who knows what audio equipment will be available in 4-5 years?

I agree with idea three being the best too since anything electronic will most likely get smaller in four or five years. You many not need a cabinet at all. Just look at how small the ipod are now and what they can store?

would anyone know where this picture came from ... trying to figure out the color of bookshelves. Thanks!