my 2cents would be to stick with a quadro k4200 or above. its a decent upgrade over the k4000. your gpu may be the weakest link for the hardware currently. if you need to save money and dont need the quadro then a gtx 960 or 970. if you need the quadro for a reference monitor, you may be able to run your current quadro as a dedicated display output and a new gtx as the cuda/render card...
i cant think of any reason to upgrade to win8.1. also i believe microsoft announced that they are giving away windows 10 for free, to windows 7 and 8 owners, for the first year. if thats true, you can go that route.
memory and hdd's really depends on your media and what your doing in adobe cc. faster hdd's will almost always be welcome, while depending on what your doing, and your footage, the ram may or may not be worth the investment. if you do get the two wd blacks, you might be able to run those in stripe/raid0 and then use the greens as backup. possibly by creating another stripe/raid0 with the wd greens and using a file synchronization program to copy any new/changed files to the wd blacks to the wd greens at the end of the day.
- I would suggest essentially forgetting about any new hard disk drives. The present and the future is SSD drives. I have a Plextor M6e PCIe card that is wonderful with >700 MB/second read rates (at least 4-6 times typical hard disk drives). Hard Drives are good for archiving old media and projects, your plans on the SSD's are good, but I would also keep current media also on a SSD. I actually have a very high performance USB3 Flash Drive the has a read rate of 180 MB/second and it is being used with my laptop for the media and project files. So I would suggest that you buy a cheap USB 3 card for your computer and a very high speed flash drive as a very portable and usable storage device.
- Get rid of the Quadro and go with nVidia GTX cards.
- Go with the memory upgrade.
Only upgrade to Windows 8 as necessary. It is not bad to use if you tame it and then it works exactly like Windows 7. This laptop came as Windows 8 and by adding Classic Shell from Ivosoft and a few other tweaks it is just like operating a Windows 7 computer.
RoninEdits and Bill Gehrke,
I very much appreciate your advice, suggestions and tips. You give additional options I hadn't even considered (or knew about).
your welcome, just make sure your system hardware and/or software can do these before proceeding. nothing worse than a tricky setup that doesn't work right.