Laptop for Architecture for 72K

Hello
I know I created a similar thread before (ie. Laptop for architecture for 55K)
But after that The budget was increased twice. Admins may delete/lock that thread. AND I also know there is a similar question created a little time back by *Smashingdude*
BUT
My question now is to choose b/w 3 different laptops.
The laptop will be purchased in the UK (Online most probably) and I need to know which of the following would be the BEST one to go for:

/Samsung-NP550P7C-S02UK

HP Pavilion DV7 6B51EA

Dell XPS 17
(Middle One! This looks like a great deal! Please let me know asap about this one as this offer will end at the 5th of June!)

AND it would be amazing if people could also tell me WHY that ones the best.

Here are the requirements:

Quad Core, 2.2 Ghz or above, 1 terabyte of storage, blue ray, 8 gig ram, 17 inch display, a very good dedicated graphics card and a great after sales service

The total budget is 1000 GBP(Great Britain Pounds)
And before the Rupees value dropped that roughly meant Rs. 80,000
ALTHOUGH I want the Laptop to be for around 900 GBP (i.e. 72K) and the rest 8K I want to use to upgrade my warranty as the laptop will not be changed for another 5 Years! Yes I know. 5. :shock:

Thanks in advance!

look no further .

Aspire M3-581TG @ 68k + tax

also this is a vague reply. For a proper reply please fill the laptop buying FAQ.

It would be better if continue in your old thread instead of creating a new one.

Closing.