Hi Nickyie - thanks for your question! Wow - with budget not being an issue, your options are virtually endless! As an fyi - all of the moderate and deluxe resorts have waterslides and all of the resorts have arcades.
You may want to start by thinking of the location you'd like to stay in. If you'd prefer to be near Epcot and Hollywood Studios and be located on the Boardwalk, the
Beach Club may be the perfect choice for you. You really can't beat the pool area - it's really a mini water park in itself!
If on the other hand, you prefer to be near Magic Kingdom, you may want to consider the
Polynesian. In my opinion, this resort has one of the coolest waterslides - it's located inside a volcano! What I also like about staying at the Poly, is you'll have access to the monorail. This will make it easy to get to MK or Epcot.
Both of these deluxe resorts will have two queen beds and a day bed. If you think you'll need more room, you may want to also check out the
vacation villas. You do not need to belong to the Disney Vacation Club to book one of these rooms.
Since your family loves waterslides, you may want to set aside some time for one of the two water parks. I prefer
Blizzard Beach as you really can't beat their family raft ride but on the other hand, if you're in the mood for an awesome wave pool,
Typhoon Lagoon is definitely the place to go.
I hope this helps get you started. If you have any follow-up questions, please let me know. Diane :)