Middling MFN?

[YoureToast]

Last Tuesday, I bet $336 to win $300 on Atlanta -6.5 vs. NYJ. The line is now available at -7.5. Should I bet the Jets +7.5, shooting for a middle? If so, whats the maximum price I should pay?

Edit: How does the analysis differ if I can get Jets +8 or +8.5?

Further edit: The game is now available at 5Dimes at +9 +105. My suspicion that the line at -6.5 was a good buy was correct. Now I need help making the proper decision.