I just downloaded from Altera's website QuartusII 6.1 and tried it out. I was disappointed that they didn't include any StratixIII device files with the web edition. I wanted to compare how QuartusII would have fitted what I'm working on, to the new devices.
I also found the installer locked you into a predefined destination install directory. At one point I changed my install directory from 'quartus' to 'QuartusII'. The new installer will let you select the path to the directory but not the end directory. When I launched QuartusII it still was able to find my license file in the other directory. NiosII EDS, MegaCore Lib and ModelSim did the same. Maybe it is a bug in the installer because when I installed it didn't display the whole path but I doubt it since all the installers behaved that way.
But comparing version 6.1 to 5.1 sp 2 I found it made better use of my dual core system then previous releases and it reported some of my signal paths slightly faster.
Good job.
Derek