Check this link out, open the pdf file then read the comparison table between the commercial packages on page 3.

[link Point to another website Only the registered members can access]
Aspen is a good "environment" for the chemicals & polymers simulation, you don't have to find everything in one package, a couple of years ago I tried to use ASPEN to simulate a commercial SWS without success....it's a kind of over rated that's why they acquired Hyprotech packages such as Hysys.