The OP has probably purchased by now, but for anyone reading this, I can recommend an iPad, I have had mine for a while and have used it a lot.
I think going for a "cheap" brand may turn out to be a false economy, as if it's frustrating to use, you simply won't use it at all. So yeah, saving up and getting an iPad is not a bad idea.
One thing I haven't missed at all with my rather low spec iPad2, is having lots of Storage, mine is only 16GB, and I'm glad I didn't pay much more for a 64GB or 128GB or something. The other major consideration is whether it is Wi-Fi only, or actually has a sim in it. so you can get online nearly anywhere. Mine is Wi-Fi only because I'm usually at home or somewhere I can connect to the local wi-fi network. If you wanted to use it in the car or on the train/bus, then you might consider it worth getting one with a sim card, but that seems like an expensive extra to me.