10k training - how fast can i get in 5 months?

[sirchimp]

Question about the 2k...how do you pick the time i should try and run them in?

Is it....:

As fast as i can run each leg....?
As fast as i can run each leg consistently (ie all legs the SAME)?
Some specific pace to improve my conditioning in some specific area?
My goal 10k pace if i were to run a 10k today?
My goal 10k pace that i WANT to achieve (but can't yet)?

Thanks,

SirChimp