Nvidia Tegra Note 7 is imo the tablet buy of the year by some stretch.
Quad core Tegra 1.6GHz with a fifth eco core for running Android OS, 72 core Nvidia graphics this was done as a joint venture between Advent t/a PC World Currys etc and Nvidia (well actually EVGA make it). Cost around �120 or half the price of the next cheapest Tegra quad core, 16GB 1280 X 800 215dpi, 1GB Ram Android 4.3 and believe it or not a very good quality Stylus!!
They were �120 at Christmas, gone up slightly but seem to fetch a premium on top when sold on ebay as i's streets ahead of anything near it's price range.
First real competitor is the aforementioned Nexus 7 but that's approx 40% dearer and doesn't have the grunt tho' it does have a better screen imo.
If I were you I'd pick up a Tegra and one of those rubbish �40 plasstic screen "toy" tablets with 512MB RAM and 1.0 GHz cpu.
Total approx �170 let's you see the best and the worst which is important as the Tegra seems to do steady 60fps on anything that's thrown at it which is not always exactly helpful to a dev with slack code as the less powerful machines might not have the grunt.<img src="http://www.nvidia.co.uk/docs/IO/143833/advent-vega-tegra-note7-tablet-side.png" border="0" />