What is the best handheld gaming system and what are the best games for it?

[Danny]

I want a handheld gaming system with a lot of good games.

[Rostan]

The 'Nvidia Project Shield'-It's a handheld gaming console based on
Android OS.It will be releasing on June 27 priced at $299 .It will have Nvidia's
'Tegra 4' processor(the fastest processor for mobile phones at present) and it can play Android and PC games..

[kyle]

You really need to get PS Vita. It is so awesome!!

http://www.amazon.com/PlayStation-Vita-WiFi/dp/B003O6EATE/ref=as_li_tf_tl?ie=UTF8&camp=1789&creative=9325&ta g=informazcom-20

The price has been dropped recently and so many good exclusive games are gonna release this christmas.