The people recommending the off brand Walmart tablet - I would never recommend going with an off brand tablet. The resolution on the tablet - it may be cheaper, but does not compare with the Nexus 7's 1900 x 1200 resolution.
The Nexus 7 is a great idea as well but the Nexus 7 runs on a Qualcomm Snapdragon CPU, not a Tegra 3. The only Android tablet that comes pretty close to what the OP wants is EVGA's Tegra Note: http
/www.evga.com/Products/Product.aspx?pn=016-TN-0701-B1