I'm currently building a games pc for a friend, he's on a tight budget but has stipulated that the radeon gfx card must be FAST but must not exceed £120, which rules the 9200 and the 9600, both being budget models.
The problem is that I've come across retailers selling the 9800 pro for around £150-£160 which is a little over my friends budget, but I have also seen retailers on ebay selling the 9700 from £100 to £110 which is well within his budget - what I'd like to know is, is there a SIGNIFICANT difference in performance between the 9700 pro and the 9800 pro?

The problem is that I've come across retailers selling the 9800 pro for around £150-£160 which is a little over my friends budget, but I have also seen retailers on ebay selling the 9700 from £100 to £110 which is well within his budget - what I'd like to know is, is there a SIGNIFICANT difference in performance between the 9700 pro and the 9800 pro?