Convert a 3x9 to 3x10 SRAM setup

Hi all

I currently have a Carrera banshee x 2010 and it has a 3x9 SRAM setup
It has SRAM x7 RD, SRAM x5 FD, SRAM x7 shifters.

I am looking to upgrade all parts to SRAM x9 2011 10 speed Inc the SRAM x9 3x10 crankset.

My problem is I am unsure wether the 10 speed cassette would fit on my bike as obviously there is only a 9 speed cassette there at the moment!
I no the spacings are closer together but there's still an extra cog there! Will I need to change my hub as well? Or should it fit straight on?

Also do you guys think this is a worth while upgrade? I have been looking at the sram x0 and xx but it's not worth me paying the extra money for what I do! I mainly use to and from work and occasionally go to my local forest.

Thank you
Sam