I think that Synopsys has come up with a Schematic editor. Look into their Galaxy suite. But I am not sure that many reliable Schematic editors work on Windows. If you are doing smaller circuits, you can use LTSPICE or Orcad PSPICE. They have small but OK Schematic editors.
Added after 2 minutes:
Anyways, the best for Schematics is Cadence environment with Virtuoso Schematic editor. They have sockets for HSPICE simulator. It only works on UNIX based environments like Linux and Solaris.