I want to buy a brand new Honda Accord Sport from the dealer?

If i was to get this car what would be a better option to get it leased or financed (i believe my credit is poor right now) and if i had to make payments of lets say $500 a month, can i pay more if i can, like $700 or $ 800 every once in a while?

If your credit is poor, you are not going to lease, nor finance.