glennmac,
I do presentations all the time on a variety of computers, and I just put it togheter with powerpoint and then burn it to CD-R. (Sometimes I joke that I am a foil engineer since I spend more time making slide foils than real engineering). Take it to the computer you want to present with and drop the CD in and go. Works great. Also good for backup of projects, but not for your whole computer, just not enough space.
Also CD-Rs are just about free if you buy a spindle of them and then put them in the CD sleeves. Fellows makes some cheap sleeves. Those jewel cases cost more than the CD-R.
DVD burners are on the way but cost way to much to date. The benifit in the future will be far great capacity than the 650 mb of a CD-R.
Also have you used a wintel machine resently? I have used alot of different computers going back to PDPs and including alot of macs (going back to the origional, the IIs, IIcx, and the more resent units). I would not buy a mac.
I have a dell that will take a CD and floppy combination and a zip disk or batteries. Works great.
As the other guys mentioned you can upgrade to a DVD burner via USB when the cost is reasonable.
just my two cents....
(I can't help myself.......) Don't buy a computer whose major selling feature is its color! /w3tcompact/icons/laugh.gif Ever see those adds for macs in pretty colors? Would you like your tractor in pink or purple?/w3tcompact/icons/laugh.gif