I think this really depends on what you are looking for. Most of the deluxes are beautiful and have additional amenities, and some have excellent locations, but this all comes with a price tag. I would suggest coming up with a budget and then looking at all of the resorts to see which one you like best within your budget. You should also consider the fact that in your first trip you may not spend a lot of time at the resort if you plan on trying to see a lot at the parks.
We have done values, mods, deluxes and had spectacular vacations at all of them! Do I prefer deluxe? Sure, but often it is go and stay at a mod or don't go at all, so I choose mod!