There are very few 10" Android tablets...most of the tablet on the market right now have a 7" screen. If you are looking for a shanzai tablet...then I think Zenithink ZT-180 is the best option right now. Otherwise you will have to wait for a tegra tablet...but those will be more expensive than the shanzai ones. If you change you mind and want a 7" tablet...in the link from my signature you can find a comparison between some tablets.
10 inch screens are much easier to find these days. I highly suggest you check out Android Tablet Universe, great place to buy Android tablets, as that's all the specialize in.