Have you looked at any of the Samsung Galaxy Notes? The S Pen is pretty cool. (There's lockin there though through the hardware and SDK as it uses SCanvas and other related proprietary methods.) Still, if you like using a stylus, it's worth a look. I just finished doing some work on SABER (mobile benchmarking software), and the Galaxy S III is a serious beast for speed. It uses an Exynos 4412 AP, which just blazes. DRAM is 2SH LP2800, so again, fast. Storage is eMMC, so right at the forefront of the game.