I have Solidworks version from 2002 on up to 2009, with Cosmos for FEA and Flow for CFD, and Solidcam for the manufacturing end of it to actually cut the parts from stock(set cutter types, toolpaths, feed and cutting speeds, etc). Looking for a demo of SW 2010 right now before I buy it, as I did not like 2008 and spent a bootload on it only to revert back to '06.
I have worked in Pro-E, Catia, and Some Rhino as well but having worked with Solidworks for so long it’s hard for me to get used to other programs. Each program has it’s pros/cons but I’m so fluent in SW that I just stick to it.