Sager laptops have upgradeable procs provided they use the same socket, GPU's provided they use the same MXM slot, build quality is amazing, and the usual HDD and ram are upgradeable as well. The proc and GPU are also surprisingly easy to upgrade, as removal of 1 back panel will give you direct access to them (no keyboard removal or having to take the whole thing apart).
Their cooling is amazing and you can purchase a unit for under $2k that will play close to anything you throw at it. gpu's to look for are the gtx 460m which when oc'd will perform better than a gts 450 (desktop) or the ATI Mobility Radeon 5870 which will perform along the lines of a 5770 (desktop). In most games ATI MR 5870 > GTX 460m.
My lappy is currently running a 460m and the only games I have trouble running at max settings @ 1080p are BFBC2 (which I run med/high), Crysis will still kill your system though.
With a lappy you will not need AA enabled as 1080p on a 15'' or 17'' screen more or less looks like 1080p on 24'' w/ 4x AA.
If you are worried about sager quality (I know its not a very well known name) take a look though this forum
. Also worth a note that many boutique brands such as ibuypower, cyberpower, and older (before dell) alienware are re branded sager units.
I recommend staying away from Alienware as you will be paying a huge amount in alien tax for some pretty lights. IMO Buying alienware laptop is like buying an Alienware desktop, you pay more for something you could have built for less.
An Asus G73 is always a good buy, they are well built and have great cooling aswell. I would still go sager, as they are much easier to upgrade, are a better quality build and run much cooler.Edited by Unacceptable - 12/29/10 at 9:14am