I agree with "Zero It's" post.
I had a 2000 DRZ 400 E, too. It was a boat anchor of a bike. By far, not the ideal tight woods bike.
As for dual sporting...
You might want to consider the "S" version (Suzuki), since it was produced as a dual-sport bike.
As well, pay close attention to the intake valves. They're made from a soft metal and tend to wear quickly. If the intake valves are out of adjustment, the bike will usually be hard to, if not impossible, to start.
Happy shopping,
TP
'03 EC 300