Whoops, missed the bit about the type of shots taken.
But the accessories do add up. I recommend a second battery, and at least two memory cards so if you're out on a shoot you're never caught short.
Add up this lot:
- decent camera bag big enough for future kit
- second battery
- two decent memory cards
- tripod (for the landscapes)
- polarizing filter
- cleaning kit
- possibly image management software as well
and it'll be more than a casual purchase. That is what I would see as a reasonable starter kit to get the most out of a DSLR. Then of course you can just keep spending, but my point is leave a reasonable bit of room in the budget for the extras.
As a general rule I reckon even basic DSLR bodies produce wonderful shots with quality lenses. The main reason, for me anyway, to spend extra on a body is for action shots -- frame rate and buffer. Oh and weatherproofing.

