Hello SRAM forum.

I am looking to upgrade my bike's drive train.

I have a 2001 or 2002 (not sure which they are pretty identical) Specialized Rockhopper FSR XC

I am looking at 2 options (assuming they will be compatible)

SRAM X-7 Drive Train Build Kit 2011 at Price Point

SRAM X-9 Drive Train Kit 2011 at Price Point

So my two questions are this.

Which is a better option? The value of the X-7 or the quality of the X-9? I am a total weekend warrior I ride a good amount but not more than once a week.

Also what options do I need to select for my bike?

Any help would be greatly appreciated.