Which dynamic usb mic should I buy?

[Janype]

Should I buy the rode podcaster or the Samson q2u? which one is better?

 

[Kasper Jorgensen]

If it is for professional or semi professional use then stay away from any USB Mics, the simple reason being that they suck compared to a good condenser mic runned through a good preamp in a studio grade external soundcard.
But with that said, Rode are usually making some good mics so I would go with that.