PS Vita for me. Don't like the name, but it was new, fully presented with great games, content and forward strategy and had what felt like the most rounded presentation content.

The Wii U felt like a teaser release ahead of a full release, with no games shown a lot left unknown.

The PS3/360 are at the solid update stage and nothing really wowed around either.

The 3DS felt rather bland I thought. The issue I feel now is that Nintendo struggles (understandably to be fair) to use its main unique feature, 3D, to drive interest as all material, etc. is in 2D apart from actual hands on with the device.

So PS Vita pretty easily really.

WiiU, but PSV runs it very close

PSV - price!!!, launch window lineup, trophies, oled screen

If it isn't region blocked that would make it's awesomeness index over 9000 ;)