Use a netbook look for the dual core versions with the atom n550 and the nvidia ion2. They cost around 400 - 500 dollar or as much as an ipad the difference is that you can chose between 10" - 12" screens you get a keypad, you get windows, you cn multitask windows prograls and even play some decent older games.
If you want a tablet for the sake of a tablet and also want to type some don't go for the ipad. There is only one good tablet for that and it is the archeos101 You can put on an external keyboard to this one and can put it on the television. It is 200 dollar cheaper then a similar iphone without 3g. And it runs android what is in my eyes better for general stuff then the ios.
Personally i'd go for the netbook an asus eee with 12" screen and nvidia ion2. It has the power of a great laptop of 4 - 5 years ago. It can play full hd movies, games like fallout3 it can multitask and if you want to use it for decent browsing and typing it is just superior in user experience for the same price as an entry level ipad.
They also don't weigh much at 5 - 7 pounds. More then a tablet but light enough to carry around whole day.