My new laptop finally arrived!

For those of you remember this year’s grueling winter, my old laptop was swept away in a snowstorm and the monotonous and incredibly stressful lifestyle of only being able to draw after work – obliterating all my free time – had begun.
4 months later and I can now spend my afternoons at work planning/sketching out future comic pages, allowing me to make a triumphant return to gaming at home and getting more than 3 hours sleep a night once the school day is over.

All thanks to this, my new Alienware M17x R4, Lilisette!
It’s a fairly mid-range model, nothing too flashy. The latest nvidia GTX card, 16GB RAM and Windows 7 Ultimate, allowing me to have a Japanese keyboard and locale while having an English display language (You cannot do this with Windows 8 as they are sold strictly as two separate versions!)
The name was inspired by a certain red-haired Final Fantasy XI protagonist. My old purple laptop, which survived one heck of a long time before sadly meeting her demise was named Prishe, another FFXI protagonist. I thought it was only natural to keep this trend going, in hope that this one lasts just as long. Who knows, maybe my next laptop will be grey and named after this chick.
I still haven’t played around with it enough, but I do have a few questions, and was wondering if some of you readers could help!
The battery/charger is a typical American/3 pronged (grounded) one with a separate Japanese 2 prong adapter. If I were to move back to the UK would I need an entirely new battery/charger or just an American 3 prong to UK 3 prong adapter? Dell sell these in their store but I am worried about voltage, etc.
Also, since this is much larger than my old 13.5 inch laptop (heavier too) is there a site that sells cheap carry cases for Alienware laptops? The official Dell store is hella expensive and I don’t want old man winter claiming this one any time soon!
Thanks for reading! If you also have an Alienware laptop, I’d love to know any pros/cons you have experienced with it so far.