I LOVE the ipad we got for our son, and at the time of making the decision the opps for exploiting it for HE were foremost in my mind.
Then the little bugger decided to go back to school.
It has still been invaluable for the apps that support the kind of parrot learning that forms the bulk of an Italian education.
However I would NOT recommend spending your "cushion" money on it.
It's good (strokes ipad with unabiding affection), but it's not that good and def. not an essential bit of kit.
If there is one lesson that I can glean from the two years HE we did, it is that I wasted an awful lot of cash by throwing money at problems, without necessarily getting solutions that justified the expense.
I'd say hold off on spending Big Money on anything for the minute, settle in, see how things go and let time underline where paid for resources are going to be most valuable to you.
If you already have a 'puter you'll find that most apps are accessable to you in a PC form anyway, and where not there is likely to be an alternative out there.
But if you REALLY REALLY want one and HE is an "excuse made of virtue rather than tech-lust" (which I have to admit is probably where my "need" came from) then get one.
(strokes iPad lovingly some more)