Both my wife and I have (a) 2 Good Laptops, (b) Kindles with 3G..Her's the smaller one and mine the large one and (c) iPad's 2 ..One without 3G and one with 3G. (d) iPhones 4's with 3G. We like the iPad's however they are better for travel and use the Kindle to read. The iPad's are good to move around the house and tap into eMail but they are not as useful as the Laptops for home purposes and the Kindle for reading. Given that we could pick only 2 I think I would prefer a laptop and a kindle. The iPad being a nice add on but not as essential as the first two. The iphone's are very good for travel and eMail, etc. and although we did not realize it at the time the GPS is better than the TOM TOM when traveling.
