Ok, let's see how many will bite this.

I have read this form, spoke to some photographers about learning about lenses and now I want to find out what you guys think of what I should purchase.

My budget is roughly $1200. I plan to purchase the Canon XTI for around 700-800 kit which leaves me 400/500 dollars left. What lens should I purchase?

I plan to purchase the following outside the 1200 budget.

Buying these overtime
Canon 50mm f/1.8?
Some type of case.
Memory (any recommendations?)
Flash (speedlite perhaps)

Do I really need anything else? I want to make the first big bang purchase for the camera and lenses. I'm just stuck on which I should purchase. I know that some will question me about what I will intend to take shots off but I want to be as verstatile as possible. I won't be taking macro shots but I guess if I have the capabilty it would be nice but as long as it doesn't tap into the budget.

Hopefully room for 2 more lense within 500-600 budget left...roughly.

Thanks in advance!