Currently QV Web servevices are running of same QV server and we are trying to connect to it directly. I gave Sharepoint straight access using Cisco portal as an example and to compare the outcome. Having second QV Web server will add addtional complication of connecting to QV server via sharepoint server and I don't think that will over come double hopping issues if there is one.
Not related to this discussion but we have tried installing QV sharepoint webpart for QV server and we thought that we have had double hopping issue. The potetial resolution for that particular one was as you have suggested to install QV Web server on sharepoint server or set up security kerberos between two server.
Sorry but it didn't make sense for this particular instant.