If you're looking for a tablet with world-beating specs, one of the highest-resolution screens available, and impressive expansion options, you'll want to look at Amazon today. The new ASUS Transformer Pad Infinity, with its NVIDIA Tegra 4 processor and 2560x1600 screen, is fifty bucks off the retail price. You can pick it up on Amazon for $399.95, with free two-day shipping if you're an Amazon Prime subscriber. It's unclear if this is a sale or a new regular price.
In his extensive review of the Transformer Pad Infinity TF701T, Ryan Whitwam found the hardware to fully justify the high price of the premium tablet... with the exception of the battery life, which is well below average. That makes this next bit especially lamentable: it looks like there are serious hardware issues with the keyboard/battery dock, or at least the ones sold on Amazon. The $149 add-on is getting numerous negative reviews which claim that the dock has a poor fit, a spotty connection, and sometimes does not charge (all issues that Ryan didn't experience). Prospective buyers might want to wait for revised dock hardware, or at the very least, buy the dock from somewhere else.
At the moment the TF701T is at the tip top of Android tablet hardware, running Android 4.3 and competing with other Tegra 4 tablets like the HP SlateBook X2 and Toshiba Excite Pro, both of which are more expensive at retail. There's also the Galaxy Note 10.1 2014 Edition, which is in the same league of power and utility, and starts at $100 more than the Infinity. Looking to save a little more cash? The Nexus 10 is still very relevant and starts at $349.