How easy is it to get out of an apartment lease?

I'm renting right now from a place that I moved into in September. I found a very similar apartment to buy across the street that will be $500+ less/month. I want to break my lease, but on the first page of my contract it says that my Lease Termination Fee is 2 months rent. Looking through the more detailed parts of the contract, it says it's negotiable though.

One thing working against me is that there was a deal where if I signed a 1-year agreement, I got one month's rent for free (which I took the 1st month). Is it likely to negotiate a pro-rated payment for that discount I received and then get out of here without any further monetary damage?