I'm a Mac and my wife has a PC plus we have an Android tablet for those days when we are off grid and charging
a laptop is a real drain. The tablet will charge from a 5v circuit or off a dedicated USB solar
panel meaning many, many more hours of music
, video, interweb and email
access. It also has built in GPS
(plus can access my Bluetooth GPS
gizmo) which is a boon for route
planning etc and has a 3G sim for interweb access anywhere we can get a mobile signal.
If I didn't have my Mac for work we'd only have a single
laptop for more labour intense computer stuff and access/transferring stuff to the tablet from our 2TB hard drive. Everything is backed up to 2 external hard drives (kept in a zip lock bag onboard) and all the really vital files are stored on Google
Drive as well. If something goes tits up with any of our machines we can easily get our files back as long as we have either a 3G/Wifi signal or mains power for the 2TB drive.
One thing I would consider getting is a Bluetooth keyboard for the tablet as the on screen
one drives me nuts when surfing or trying to compose an email
and a pointer as I have stupid fingers!!
At the end of the day you pays your money
and you makes the choice but the old adage of KISS still applies. I'd still get the best spec machine I could afford with as much RAM as possible and the fastest chipset to make it as future proof as you can with a computer. The Panasonic Toughbook is a good option if you can afford it as they are pretty much bomb proof and the Sony Xperia tablets are waterproof and dustproof so very resilient to onboard life.