probematic transposition

[David Bobroff]

 I've got a piece in Eb major with a section in E major.  For the 
instrumentation involved it will almost certainly be necessary to 
transpose it all down a minor 3rd due to the range in some of the 
parts.  The Eb section comes out in C which is just fine but the E major 
ends up in C# major which is not so convevient.  Db would be much easier 
to read.  Is there a straightforward way to accomplish having the Eb 
section in C and the E section in Db?

-David