For the same price @ Comet:ASUS X53E-SX118V 15.6" LAPTOP
It has the SandyBridge Core i3-2310M 2.1Ghz CPU and HD 3000 graphics.
That compares to the X52F's Core i3-380M 2.53Ghz and HD graphics.
The i3-380M is a tad stronger than the i3-2310M but you wouldn't notice the difference. 2310M would equal a Core i3-3xx CPU @ 2.4Ghz.
The major improvement is the HD 3000 graphics which will help give you smooth HD video playback which is why the X53E is probably going to suit you better.