2) The lens ... if you thought buying a new camera was an issue, the lens you need to have for the shot you describe costs as much or more than the DSLR, and you need to know that is "typical" of low light lenses. I would recommend, without hesitation the TAMRON SP AF 70-200mm f/2.8 Di LD for the "cheapest way" into this level of shooting.
Thats what I was looking for, Lens recommendations. Thanks for all that info!

I know the a230 is capable of it as a friend of mine uses his for concert shoots and the images look great. Though he has an awesome lens. The Tamron looks good but I think I will hold out for the Sony you recommended.

Thanks!