iPad 4, nook hd, kindle fire hd, and gtab pro 8.4.. With an 8" insignia windows tab coming as a Christmas gift. Got all of them (but the iPad) on killer deals.
For "serious" use, it's the iPad, but the gtab pro 8.4 is moving up a close second. With better performance (thanks ios8 for torpedoing my iPad performance), split screen, and support for my Motorola BT keyboard w/trackpoint, and MS Office for Android preview, it is becoming a slick little package.
Almost forgot... I also have an iPad 1 that serves as the "picture tube" for a vintage TV.
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Its a sad day when a Samsung Tablet running lagwiz has better performance than an iPad.