If I were you, I'd stick with the Rebel. You've gone from spending $500 to $800 on the Rebel (plus a lens). If you get a 10D, you're talking a lot more money. You could choose the D70, but with the "kit" lens that is also about $1300. For what you want it for, I think the 10D is overkill. You have to take the type of lenses into consideration also. You can always begin with the 50mm/f1.8 for $75. It's a good lens and will get you started while you decide which other lens you want.

Just my humble opinion. Depends on where you see yourself going with photography in the next 2 or so years.

Liz