OK, here's my freebie.
We use Toshibas, and we're on our third. They do last. The first two were used offshore and inshore, in extremely humid salty conditions. No trouble, except the one time I doused the keyboard with salt water. Lost that one, but it did come back, with an external keyboard. This one, a cheap Satellite model has been working for 4 years now on each of Journey On's summer trips. It has lasted through the humidity of the Great Lakes, the bumps in the interstates, and constant opening and closings.
We use it for navigation (Cap'n, Fugawi, Maptech,) e-mail and Internet access, Judy's writing (
Journey On's Travels ) and keeping logs. The present operating system is Windows XP, on which all our programs run. I do hear that Vista will not run all the pre-Vista programs. As far as navigation programs, they all appear about the same; you have to learn how to use them to really appreciate them. I use Fugawi at this time for navigation. Our (old) version of Capn'n provides tide and current information. WXtide32.exe is free and cheap, runs under Windows XP.
Speaking of keeping a log, EXCEL serves that purpose admirably, allowing you do do a lot of processing to see how much gas you've used, how far you've gone, how much gas you need to get home, etc. Great data base program and analytical tool.
We use the laptop as a navigation tool with a hocky puck GPS, especially when it's foggy since our plotter would then be in the radar mode. Of course this also means we have an inverter, since the computer battery doesn't last long enough for some passages. Remember you can download
FREE navigation charts for the USA, and run them under any of the common navigation programs.
I would look into a radar that plugs directly into the laptop, since you automatically would have a large screen display. I don't know if it would save money, and you'd have to mount it where the helmsman can see it but it's a thought.
The computer has a 15" diag screen, which I think is a great size. Any bigger and it's too large and heavy; a smaller screen doesn't provide enough resolution. Those small (and cheap) computers using an ATOM processor probably don't have the power to run a navigation program.
The usual accessories are available on almost any brand: USB ports, wireless Internet connection, mike and speaker ports, as well as speakers, DVD plaver for when you're stuck in the rain, Firewire, etc. These aren't unique to any brand. I assume this also includes MAC's.
If you'rre happy with MAC why not buy another MAC? I only use Windoze because they're cheap and have a lot of software available.
Boris