The S7000 has manual controls so the next upgrade will naturally lead you to a DSLR camera.
The DSLR will provide you with even more manual controls.
The Nikon D70 or the Canon 350D would be a good choice.
Now, don't start a fight by asking "which is better".
Nikon and Canon SLR owners have been arguing for years. And they never come to an agreement.
Bottom line -- you will be pleased with either one.
Read the reviews and see which one fits your requirements.
...
..
.
I am using a fuji s7000 and plan to upgrade the camera.I find fuji good but when i try to take moving objects the camera does not give me great results and while creating close up it captures all the light in hte world.I have taken about a 1000 photos already and think its time to upgrade. Pelase adive. How about a D70s of Canon 350

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic