According to Notebookcheck they give around the same performance (they're ranked next to each other).

not much diff...but gt640m may b just a tad better...dunno why dell wan to use diff gpu for 2 laptops with same price...

i would personally go for the opposite...there isnt much diff between gt640 and 7730M...however the 15R if u choose to spend more, u will get a 15" FHD (which is way way better than a 14"HD screen) and msata ssd which will help increase the os booting and overall speed

Screen wise yes. But having a FHD screen do puts a heavier load on the gpu. But of course, that build would cost more than 3k rite ?

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Added on June 29, 2012, 9:25 amAnyway, previously i stated that dell will be sending me a new set and i'll be getting it back by the 10th of next month. Charged me rm2719 instead of rm2999.