Just tell dell that your keyboard is not functioning. Thats what i did when i broke one of my keys.

Broken key on the keyboard no, but not functioning key yes.

Prices for external dvd drive range from 100 ish to maybe 300 ish. As much as i love my m15x, i actually got me a m11x r1. M15x us just too heavy if you move alot in a day

M11x is kinda heavy for a netbook but lightest among notebook. All i can recommend is find a better quality bag?

Can you clarify whats currently running in your m11x? Are you playing game or using Word or surfing?

50c is purty normal for surfing, im in office which is quite warm as everyone here cant stand cold.. my m11x r1 is at 45c with light surfing and words open.

For m15x I would recommend most 17 inch laptop bag. Currently using everki beacon. It's large and has space for another lappy or you can try alienware orion

Warranty does cover cpu overclocking, but i doubt it cover throttlestop. I can run sc2 fine even on my m11x r1.

If you're always on the move the m11x is purty decent for gaming. It does get use to seing smaller screen. Just remember that it's not as powerful as it's bigger brothers. Hence I only use my m11x on days I have lotsa meeting and m15x when I just sit in office goyang kaki

That depends on your budget and what are you gonna use it for?Do you have to be on the move all the time? if yes, m11x is decent, if you just gonna leave it at home, i would recommend just diy a desktop with you budget:)