Help Alex buy a laptop part 2. Processor differences? T2250, T5200 and T5500?

[LeperousDust]

Right well heres an update because i'm bored and should be revising for an exam im going to fail tomorrow.

Pro's everything, serioosuly!
Very VERY fast
Neat little inbuild weccam
Its TINY!
Battery (9 cell) is excellent, 4 hours of good work + depending on screen brightness. It'll easy manage a dvd.
Keyboard feel solid and nice (metal magnesium alloy something or other)
four usb ports are handy especially for me.
Graphics on mine (go 7400) are top notch for a notebook
Fan it quiet, and rarely used if just web browsing email checking etc.. and i'm a sound freak (former reserator owner!)
Loads more too really

Cons
True bright screen or whatever, glossy wasn't a good idea, on bright days outside it sucks if your watching something black/dark coloured. But very good in the shade/night/dark etc...
Bottom right of keyboard (right arrow button only) is "mushy" i didnt actually notice it until i read about it,but now i have its a con, but i can easily live with it.
Nvidia drivers for vista are crap, but thats not dells fault and that should solve itself eventually
Gets pretty warm i think, but ive never owned a laptop, fan comes on occasionally, but i do make this laptop work very hard (external monitor keyboard and mouse) and i use it like a real desktop.
Heavier than other small laptops but its no where near "heavy" as in its annoying, easily portable in my experience

Any questions ask, but if anyones thinking about a laptop go get this one!