I have the Digitech 2000 and my rhythm guitarist uses the Digitech 200. Because of all of the good built in modeling effects it has improved sound a little, but amp quality has a lot to do with it also. There is an age old saying in the electronics industry, "garbage in = garbage out".
I like the amp setup that lynng uses. I drive an old tube Music Man amp with a Fender Prinston and the Digitech 2000 in line. My guitars are both custom made, Strat sytle and Gibsom SG that I built.
Finding the right combination that works for you will take time, but trust me.....you'll get there.
KeepOnRockin!
SRV is king of the slingers!
PEACE
Th' WOLF
Th'WOLF