That's quite a list of software! Are you planning on doing professional, paying work with it, or are you a student or hobbiest?
If professional work is what you are after, go with the Genuine Quadro/FirePro solution. Check E-Bay for older models, especially Quadro 3800's now that the new Quadro's are coming out. Prices are dropping rapidly as people sell off older cards to upgrade. I've seen Quadro FX 1500's for $40.00! Jam 2 of those into and SLI config and you got some decent power rolling out for less than $100. The older FireGL's are still good as well (ATI went from FireGL to FirePRO sometime in 2008). These older cards are cheap, work great and are tried and true for professional applications like you mentioned.
As for hobbiest or student use, go for the softmod. You have the luxury of not depending on the card to perform correctly in the throws of a huge project with a looming deadline (well, maybe as a student you might, but you can always use the schools system). Again, you can pick up a card on EBay very cheap to test the softmod. And, you can undo the softmod and play games with it, something the workstation cards cannot do very well.
Not sure about the Windows 7 softmod issue. Sorry.