You don't say much about what you plan on using the new machine for....Good "On the road" Macs include the MBA (Macbook Air) range, for heavier duty work and larger capacity storage consider the MBP (macbook Pro) range.
Best advice is always to go to an Apple outlet and try before you buy. Take a look on the Apple store too...Will give you an idea of what's available.
Ok, thanks. Yes it should be good "on the road", in and out of cars, rough handling and occasional bumps.
I will go to the Apple store and check it out.