I suggest taking a look at the different days. Last time we went - we wanted to go to US last, however by going at the beginning of our vacation - I was able to save about $300. So look at some alternate dates at the beginning / end of your vacation.
Take a look at the total cost. What is the Hotel vs what is an offsite with purchasing EP.
Also look at Hotels.com or loweshotels.com etc. That is what we did and it worked out great!!! You do NOT need to book via US website.
Also remember you are going from a WDW value to a US Luxury - so it is reasonable to believe there is a price increase.
We LOVED having the EP - we didn't plan a THING. If we wanted to go on MIB 3 times in a row we would (and did).