need to help my sister get a new desktop.

needs to use photoshop as mainusage and she does a LOT of downloading, films/music etc

also need to have a soundcard with lots of outputs to use her existing set up, which is/was a top spec dell.

budget is around £500-700, desktop only no monitor or anything.

current monitor is not DVI i believe.

are we better off with a custom PC or off the shelf?

any links would be good