Whilst front-of-the-line access is a fantastic bonus I'm now so used to trip planning and working out a time-friendly touring plan that I really don't see a need (in most cases) for front-of-the-line access.
For me free dining is the best for saving money and hence is my personal favorite.
Front of the line access
It's a beautiful thing and was ultimately my choice. No lines, no whines.
Free dining
Without thinking into it too heavily, this was my first choice. It would save you a tonne, which is exactly what you would weigh at the end of the trip if you chose this option. I simply can't survive off of theme park food, especially outside of Disney World and Universal Studios. It's great for a day or two, but then I start to feel physically terrible.
Early entry
This would have been my choice, though I didn't agree with your specification of "early". I love being at the park after hours. The lines and crowds are limited, the atmosphere and temperature are cool, the employees are laid back. However, I don't enjoy waking up even earlier to get to the park just to have one hour of extra play. If you had just specified this category as "extra hours", then I would have chosen it.
I'm fat, and I eat too much. However, I eat infrequently in parks, and If I knew I had unlimited food, that might change. So no need for that.
Front-of-line all the way for this rider.
Why aren't you staying at a Disney resort while going down there? They are great!
Arrive early, take in three attractions before the park opens, fast pass a couple without the interactive queus. Midday take a break and then return for extra hours.
It sure is a nice perk to have in your back pocket, especially if you have already traversed the full queue once or twice.
In the days of $8 theme park hamburgers and $3 soft drinks, nothing has more value than free meals at your favorite theme park, especially ones that isolate themselves from off-site restaurants (WDW).
Front of the line access is cool, but with FastPass, single rider lines, and other tricks of the trade, FOTL is only a perk for the uneducated.
Early access or even late access for that matter, are cool, but most parks that offer this perk, you're only able to get one or two extra rides, and that's only on the most popular attractions. Also, for those who have been to parks many many times, getting an extra hour here or there really doesn't make that much difference in enjoying a day.
Everyone needs to eat, so it's absolutely free dining for me. In fact, it's so enticing that our trip to WDW in October will be an on-site visit because of the free dining promotion.
Lastly, with front of line access, it isn't so much about getting to ride something with a minimal wait, it is about getting to ride something whenever you want to ride it, with a minimal wait. Huge difference. Sure, you can get up at the crack of dawn, be the first one at the park and zoom right onto Spider-Man, but isn't it a bit more relaxing to wake up naturally, eat a nice breakfast, then mosey on down to the park and zoom right on Spider-Man?
Front of line access, all the way.
My trip report should be of some help for visiting Harry Potter Robert when you get there!