I was thinking about the GTS 450 for you too, but if you're gonna go that route, I would recommend the 460 over a 450.
I'm sure something like this would suffice:
I had the 1GB version originally, then upgraded to the 470, but my uses are Premiere primarily. If you're looking to cut back...
Do you really need a 128GB C300 @ $289? Once all your apps are installed, the only thing that's going to be done off the SSD is reading data to load the programs.
You could get the 80 GB x25m for $179, and put that extra $100 towards the 470:
If you want 120GB, this is a solid option as well @ $229:
Personally, I would be willing to spend more on the video card, than an SSD. Long term, it makes sense, considering your parents don't upgrade very often. I'm sure future versions of Photoshop will be even more GPU accelerated.
Make your scratch drive on a regular HDD, although it would certainly be faster on the SSD, those SSD's would fill up fast. I've had some Photoshop files get as high as 300 - 500MB after effects have been added. Then again, I don't use Photoshop the way everybody else does. That's another story.
It's best to use the SSD for your boot drive, and load your most often used apps on there. I'm using the 80GB X25m now, and I have CS5, Office, and a few other programs on there, and still have 30GB FREE. Plus, Photoshop opens in about 3 seconds for me, compare that to however long it takes now.Edited by 2010rig - 2/23/11 at 9:12pm