anyone who owns a Specialized Hardrock Disc 2010 like this?!

Hi guys. Please let me know what are your upgrades and how good are they?
specially its gear system because i want to upgrade from its stock sram 7-speeder.
i want to hear from actual owners of this bike. also, advice from all of you as well.

p.s. can i possible make this a a gear higher? 8 or 9 speed?! thanks.

 

Is this a new bike?

Yes, you can upgrade to an 8 or 9 speed. 8 speed will require a new rear shifter and cassette. 9 speed will require a new rear shifter, cassette, chain and rear derailleur.