We are here now at Universal, doing 4 nights at RPR, then 5 at BW, and 7 day DIS western cruise. I have to say, of the 3 hotels (we've done PF 3 nights and HR 9 nights in club) I'm really liking everything about the Royal Pacific. I think it could be our favourite.
Had a fabulous meal at Toothsome last night - awesome quality food and atmosphere.
A few things to point out:
1. If you haven't seen Diagon Alley and (obviously) haven't done Volcano Bay, then yes I really think you can fill a week at a very leisurely pace. Please check out Diagon Alley at night-my personal favourite... with some ice cream in hand taking it all in.
2. If you can swing it, stay at a hotel that offers EP. I suggest RP - been here 2 days - have NO IDEA why it's the least expensive of the 3 Loews??? Love it so far. Will likely come back given the choice of the 3 EP offering hotels.
3. We love Disney too - if you want to save money... do what I do ... rent points from a DVC member. It's cheaper than nights at any onsight at both Uni and certainly Disney.
4. Book early- we plan 10-12 months ahead of time to get the best savings. Even the cruise- got something like a 20% discount via putting a deposit down last time we cruised - provided we cruised within 2 years. Will likely do it again this time.
5. Universal is way more relaxed than Disney-but even Disney can be relaxing if you prepare yourself with the fact that .... "you won't see and do everything ... so get over it."

For example - we did Volcano Bay yesterday am. We were there at the open 7:30 am - followed some great advice from other DIS members - did most everything by 1pm (BUT NOT EVERYTHING) ... left before real chaos ensued ... hung out at the RP pool in the afternoon (took advantage of the Hurricane Glass specialty drink discount

) ... and survived ... hehe! First world problems.
.... on a side note ... the Jimmy Fallon ride was great... the pre-show (although long) had us in stitches. The Panda hung out with me and the family...loved that... it was hilarious.
On vacation now, so I won't be lurking on the boards too much (insomnia can be a good thing - hence I'm here) but I think that sums it up for me.
Cheers & happy planning.