We own at both BW and AKV. BWV has always been our favorite. We love the light decor of the rooms, the atmosphere, the food choices and the location. My husband would choose BWV over any other in a heartbeat.
That being said, and with BW being my fav as well, I must admit I really do love AKV. Of the two choices, Jambo or Kidani, I'd go with Kidani first, but Jambo has it's own offerings. It is definitely a tough decision to make! All life's decision should be so tough, right

Having a car makes the decision tougher too, because IMHO AKV offers so much.
This is how I break it down....I've stayed at AKV as an all adult party a couple of times. We had the car on one stay, but not on the other. I found it to be just fine either way because I planned alot of our stay around the resort, and I think that's the key. With AKV that's so easy to do too. We did AK park, since it's such an easy bus ride and doesn't share a stop with any other resort. We love the park, the shows, the rides and mostly the animals. We also spent a day at the pool, drinking at the pool bar, lunch at the pool bar, a little sun and a dip when we got too hot. It was a great day. We spent some time at the lounge over in Jambo too, I love that lounge, (and that antioxidant cocktail!)
We planned the Wanyami Safari, as only guests staying at AKV or Jambo can do, which includes the signature dinner at Jiko - yum. And we lounged at the fire pit or on the balcony over looking the savannah (we had a standard view room). We took the bus one day to DTD as well.
Since you have a car you have the freedom to go to any of the parks and save a lot of time, not having to wait for the buses.
These are my reasons for loving a stay at AKV, especially with an adult only party. Also, between Jambo & Kidani there are the three sit down restaurants, and Boma's got a great buffet breakfast (as well as serving dinner), you have two pools and the quick service restaurant which has pretty good offerings, The Mara.
Both lobby's are gorgeous and there are tons of places to view the animals if you're not in a savannah view room. I have to say if it were an adult only party and I was going back to WDW, I'd pick AKV. It's awesome, laid back, gorgeous and offers alot....oh wait....I AM going back with an adult only party!!! And I AM staying at AKV!


Guess I convinced myself. Hope I didn't make your decision even more difficult though!

Have a great trip and have fun planning.