so it is. i'd seen your link, and simply seen the gtx285 and i5. but you are right, the xotic version can also be fitted with a 5870 and i7 for a lower price.
though i think such a system would be a little too much for what the OP wants. hence why i posted the second one also.
to be honest though, i dont follow the laptop hardware as closely as i used to. and im not sure how the mobile GPUs stack up to each other quite so well. ive posted my links, but ill leave the recommendations to you maz