What you need is:
- CPU: the fastest i7 quad core you can afford
- At least two internal 7200 RPM SATA disks
- If possible 16 GB memory
- 1920 x 1080 monitor resolution
- nVidia 560M or better video chip with at least 1 GB GDDR5 VRAM
- USB3 and eSATA connections
- A wall outlet in the plane. Batteries wont last very long.
I did not check any except the MSI. It comes pretty close to Harm's requirements and if you go to XoticPC you will see that they can offer you an optional second disk drive (in the Optical drive bay) and upgrade the memory to 16 GB if you can just push your budget slightly. The only thing missing would be the eSATA connector but it does have two USB3 connection which is almost as good as the eSATA. A few of the newer airplanes do have a seat-side AC outlet.
We have been seeing more and more of these. Once, they were only in Business Class, or First Class, or in the lavatories, but on United Airlines, all of the 737-800/900 ships have had them (mostly on the old Continental routes).
Have not encountered them on any of the A320's, but will check a couple of A321's in a few weeks.
Do not recall any on UAL 757's (except on their PS ships), 767's, or 777's in Coach, or Economy Plus. Have not been on a 747 in so long, that I cannot comment, and have not flown on a new 747-800, or 787.
Good luck to the OP,
.....be advised.....many airplane 120v AC outlets are LIMITED in wattage you may use.......some are 90 watts max......once, years ago, I plugged a 100watt AC car inverter into the airplane DC 12v socket and started to smell the odor of burning plastic!! The electrical engineering on these planes for a power hungry editing laptop may not be up to date,or, dependable.....if there is power at all!!...
Yah I was on a UA 757, and there wasn't an outlet... I ended up getting the MSI GE60, and it definitely was more than enough to cut 5D footage converted to cineform. but lasted barely 90minutes before the battery burned through