Closettv
I would try one of the cheapie 4 bays first because they are light. Make sure you can return it. My experience is that you will need an amplifier so at the same store try to get an antenna mounted apmplifier. It comes in two pieces, the pre-amp on the antenna and another amp near the tv with power. Its unfortunate you cant mount something outside.

When I first tried my CM4228 indoors without an amp close to where I had my philips indoor amplified antenna... the 4228 was actually a bit worse. Be prepared for some disappointment and lots of experimentation.

HD is great in one way... gone are the snow and the ghosting and the picture is fabulous... the problem is you need a really strong signal. You either get a great picture or nothing.