Thanks for everybody's views. At the end of the day I decided to leave the system on the "older" drive. I used the partition that was my docs for all my software installers/ yet to tries and the maybe never tries. I stuck all my personal stuff on the new drive along with a partition for my Macrium backups.
Photoshop now has the oldest 60gb Maxtor drive as its scratch disc!
Samsung hard drives ROCK! The best spinners out there for sure!
This will be my 3rd Samsung drive, plus others that I recommended. Lovely discs especially after my old creakers, silent as a silent thing.
Only issue I've had, which some of you may recall, was my first one ended up with pretty dubious SMART readings, that was all down to the crappy SATA cable that came with the PC and kept working loose. Only so much Blu-Tack you can use before you relent and buy a new cable!! Once I'd swapped that out, not had a problem since.