There are plenty of alternatives, that one is using an older version of Android. Look for one running Android 3, otherwise called Honeycomb.
Most will be running the nVidia Tegra 2 CPU, which is pretty good but newer CPU's are coming out and early next year we will see QUAD core's in Phones and Tablets (that's like having 4 CPU's/Processors).
The Motorola Atrix is quite cool, as is the new Asus EEE Transformer that's a tablet but docks as an Android netbook/laptop.
There are also dual booting Android/Windows 7 tablets, Viewsonic is one of the rebranders.
The iPad is fine for most people, but I don't like being locked down into their ecosystem (anyone saying 'but aren't you being locked down to Google's ecosystem' doesn't know a thing about Android and/or Openness). I also like being a geek and installing different ROMs.