I just upgrade the entire family to the premier passes and I really can't see NOT doing it. Even if you are only going to be down here 3-4 times there are so many perks that make up for the difference. As you pointed out yourself, it's down to a $30 difference due to the fact that you get the HHN ticket included. Well for that $30 dollars you are getting:
8 bottles of water which equals $22 in free water. It might like a weird perk, but we at least have two bottles of water each visit and money saved is money saved.
Free Valet Parking. This is wonderful and saves so much walking and time and it also gives you that wonderful, "I'm special" feeling even though you are getting it for free.
Bigger discounts on everything in the park and Citywalk which can add up real quick. I think Pat O Brians gave us 25% off our meal the first day we used the pass and that was like $7 off the bill.
And the biggest is the express pass after 4 every day. It really is nice to know that you don't have to bust your hump all day long to get to all the rides you want to. You don't have to get there right at opening and hurry hurry hurry all day, you can do things at your own pace because you know you have a trump card starting at 4. You can really get some things done in a few short hours with that perk.
I upgraded from my preferred pass because I just couldn't see any reason not to. HHN ticket $30, Water $22, food discounts $???, it broke even real quick but I also now have express after 4 every day. Best value for the money if you ask me.
There's my 2 cents.