Dell studio 15 or acer aspire 5740g?

Hello and welcome to the forums  
For gaming,VGA is more important,so my vote goes for the Acer one.
5650M is far ahead of 5470M in games

Thanks i could never tell was the trade of in processing power worth it. How would an Nvidia gt330m compare. This ones slightly more expensive but it has a better processor again?

Dell Vostro 3700:http://configure.euro.dell.com/dellstore/config.aspx?b=...

The xp mode in windows 7 professional would be handy too as i have some pretty old games i like playing as well.

5650M is faster than GT 330M too.
5650M performs like a GTS 250M(even faster),and GT 330M performs like GT 240M
http://www.notebookcheck.net/NVIDIA-GeForce-GT-330M.224...

Okay thanks do you think it would be worth paying an extra £100 or so for a studio 17 with a 5650m and a core i5 430 instead of the acer if i wanted to convert video files occasionaly? Or are the processors too similar to make a noticable difference?

I think that's worthy for £100,because you get a faster CPU + a better display

Thanks alot id say thats the one ill go for then