Jimbob: I'm not even entirely sure what kind of stress I'd put on the A10, its been so long since I actually used a PC with a decent bit of power! I was initially looking at the Intel for longevity and upgrade options but it seems they're bringing out a new socket next year.
Thanks for that advice, I hadn't spotted the reliability issues with the Vertex 4 but will definitely look into it now, I was tempted by the 5 year warranty... I've always been a fan of Samsungs spinpoint hard drives so may look at what they're offering in terms of SSD. I very much doubt that the SSD will be written to/accessed all that often which, from reading around, seems to cause issues with flash memory. All my media is on a NAS drive.
I think you've hit the nail on the head there tbh...