Highly recommend you check out the following forum: http://forums.notebookreview.com.
I can't speak specifically to the JW, but I have the G73JH. Great machine. A small % have had issues with improperly applied cheap garbage thermal paste. Looks great, when assembled properly runs very cool. Touchpad on the G73 series is absolute garbage. Keyboard is a little . . spongy [enough to be noticeable if you're a heavy fingered typer]
Runs wow just as well as my 4Ghz overclocked AMD X6, 8 gig ram, overclocked 5870 desktop at near max settings [shadows down 2]. Both machines perform virtually identical.
By comparison, Sager has a reputation for superior quality. No bloatware. Easy access to all essential hardware [gfx card, CPU, etc] Haven't actually touched one [family member has one on pre-order] but have heard very promising things about them.
As far as Xoticpc.com goes, this is the vendor my family member has ordered their notebook from. They have an active presence on the forum linked above, and have a history of doing everything they can to actively help out their customers--as well as general forum post advice, etc. From what I have seen thus far, they are very well respected by that particular forum community.
And for pete's sake, if you need a notebook, get a notebook. People that say "gaming is for desktops" obviously haven't used one of these newer machines. As far as price, Xotic has a 15" sager for $789 with a sandy bridge i7, optimus equipped Nvidia 540.
While it's true that a notebook will have less performance capability than it's desktop equivilant, I challenge those desktop users to carry their rigs around on business trips for half the year ;).
Oh, last note: the SW version of te G73 is a 3d equipped machine, hence the price increase Edited, Feb 14th 2011 7:28pm by seneleron