iPad is an awesome product.
But rather than go with proprietary items (any Apple related MUST be downloaded via iTunes), seriously look at the Android products (and tablets).
Decide exactly what functionality you need.
For instance, I have the Google Nexus One. This phone is a gem. Expandable memory, spoken directions, etc. Most of all, it becomes a portable hotspot (no additional charges). With that, there is no need for me to own a tablet that must be 3g or 4g (added fees). Instead, I can use tablets devices that are simply WiFi enabled. And those devices connect to the web via my phone no matter where I am. If I can get a signal, I can get on the internet.
That feature alone is going to save you additional upfront charges of about $100-$200 bucks for each tablet because you do not need to purchase the 3g/4g capability. Plus, you are saving an additional $50+ per month, PER TABLET, in subscription internet fees.
So, where does that leave you? Compare, compare, compare. I have the iPad and the ASUS eee Transformer. My pick between the two is the ASUS, without a doubt. Faster processor, Android, expandable memory, SD and MicroSD card slots, much clearer screen, and just a joy to use.
To satisfy both of you, perhaps a sweet Android powerhouse smartphone and an Android tablet. If it is reading books or surfing the web, both will do nicely (as well the iPad/iPhone combo). But the front end and back cost savings over paying upfront upcharges for internet connectability along with a monthly subscription (for both) can be easily in excess of a thousand bucks a year.
Above all, do your shopping intel on cnet.com. Compare prices, specs, reliability, and so on. You will get editorial reviews. More importantly, actual user reviews.
I am partial to ASUS tablets (stay away from toshiba, Sony, Acer or others...there are many Android update issues). ASUS has the slider tablet (with a qwerty keyboard - kind of lame) and an all new Transformer Prime with quad core processors and Android Ice Cream Sandwich OS. The 32gb is $499 which is really all you need since it is expandable. Plus a pretty decent 8mp camera on back for stills and video, and front facing camera as well.