It all depends on what you want from the resort. If you want to sit on your balcony and relax, then it's WL. POFQ is a Mod and doesn't have balconies.
Is MK your favorite park? Then stay at WL. The transportation to MK from there is excellent.
Going to Disney Springs a few times during your trip? Then pick POFQ, since the boat ride from there to DS is great.
Since the price doesn't matter, the real question is What do you want? Do you want a Deluxe resort with a balcony in the room, a good view (assuming the view rooms are available for your stay), indoor corridors, and a somewhat larger room?
This isn't to say the rooms at POFQ aren't nice--they are.
If money weren't part of the equation for me, I'd stay at WL for sure, and I love POFQ. Just remember that the room rate isn't the only cost of your WDW trip. Tickets, G+, ILL$, food, etc., all are expensive now.
I'm guessing Riviera is even more expensive than WL. For me, I'd still pick WL. I much prefer it.
Good luck with your decision! It's a fun decision. And have a great trip.