[Twisted-Python] New user questions

[snacktime]

Well as the docs say, it's kind of difficult to know where to start...

I have an application that is client/server based using a simple
custom protocol.  The client sends one line of data, starting with the
ascii STX and ending with ETX.  The server processes the data and
returns a response  with the same STX [data] EXT format.
Communications are done with SSL.  The ability to handle high
concurrency (200-300 TPS) is the main objective as this is a
transaction processing environment.   The application also uses
Berkeley DB through the bsddb3 module as a data store.

I looked through the sections on writing servers, the application
framework, and writing plugins.  What approach sounds right for this
particular application?  Right now I am using mod python with apache,
which works fine but is a bit of a resource hog and I'd also like to
get away from having the extra dependency of apache + mod python.

Chris