Thanks for the comments.
EFDreamerBG and jeesuspietariI am looking Clevo P177SM details e.g. at the top of this thread:
http://forums.overclockers.co.uk/showthread.php?p=24686483
Product page is similar to this (though obviously with diff graphics card):
http://www.overclockers.co.uk/showproduct.php?prodid=LT-023-OE&groupid=959&catid=1828
To be honest it looks like the only reasonable option, as Alienware is overpriced (I am buying this in the UK so some things distributed only in the US I don't really have access to). Nice thing is it is very easily maintable meaning you don't have to take apart the whole laptop just to clean off the dust/apply new paste which you will need to do periodically to avoid overheating).
It does have 2 separate fans and heatsinks too so heat shouldn't really be an issue.
The only thing I am worried about is regarding overheating issues... I see people write quite often ("I got a laptop and it started overheating the year after"). Is there any other standard cause for this other than accumulated dust/old heat paste which can be fixed? Like components degrading or something.
Budwise, the tradeoffs you have listed I am happy to make. I have had a 17 inch laptop for 6 years now as I have been flying back and forth in Europe and it's worked fine. I will always have a 17 inch laptop basically, whether or not I have a desktop for gaming.
Pedobear, the PC you have listed would handle CoH 2 on high details/physics/... (with vsync + AA off) OK? I see the card is tested as getting around 36 fps minimum on Tom's HW on a machine with i5-2550K @ 4.2 GHz. I would probably get rid off the spin HDD as 120 GB is enough for windows and 2 games hopefully, which is enough if I only use it for gaming. I don't care that it's not future-proof, I am playing CoH 1 now and it's still pretty good for someone who spent childhood playing Age of Empires 2.
I can get a bigger case too, because by "moving" I mean I will be flying somewhere far, not taking it in a car. So I would need to deconstruct the PC and ship at least the important components by the likes of UPS.