No special reason. 2GB always seemed to work. I also have some 4 and 6Gb systems with SSDs. So I settled for that. It is probably a conservative number. I am sure less pagefile will work too - in most cases.As a matter of interest whs, how did you settle on 2GB for pagefile?
I have reduced mine to 500MB. 2GB seems overkill for most 8GB systems, unless you run a lot of memory intensive stuff and expect to run out of RAM, in which case 2GB might not be enough!
I think Adobe Premiere is still a 32-bit app, so limited to 2GB RAM, so 8GB available memory should probably be enough, but he may need to suck it and see.