Which NodeJS version should I use for Ionic?

I was using Node version 0.10.40 to run Ionic. It seems running fine, however ionic shows this message every-time I run it:

******************************************************
 Upgrade warning - for the CLI to run correctly,
 it is highly suggested to upgrade the following:

 Please update your Node runtime to version  >=0.12.x

******************************************************

So, I update my Node to version 0.12.7. But then when I try to reinstall cordova & ionic, I get a series of warning & errors such as:

npm WARN engine cordova-js@4.0.0: wanted: {"node":"~0.10.x"} (current: {"node":"0.12.7","npm":"2.11.3"})
npm WARN engine npm@1.3.4: wanted: {"node":">=0.6","npm":"1"} (current: {"node":"0.12.7","npm":"2.11.3"})
npm WARN engine xmlbuilder@2.2.1: wanted: {"node":"0.8.x || 0.10.x"} (current: {"node":"0.12.7","npm":"2.11.3"})
npm ERR! Windows_NT 6.1.7601
npm ERR! argv "C:\\Program Files\\nodejs\\\\node.exe" "C:\\Program Files\\nodejs\\node_modules\\npm\\bin\\npm-cli.js" "install" "-g" "cordova" "ionic"
npm ERR! node v0.12.7
npm ERR! npm  v2.11.3

npm ERR! unexpected eof
npm ERR!
npm ERR! If you need help, you may report this error at:
npm ERR!     <https://github.com/npm/npm/issues>

It end up fail to install. So, what version of NodeJS should I use?