Buy used R/D bows from this site. Start with a couple; sell the one you don't like as much. Buy another.
You will soon find out how much R/D you like, what length bow you prefer. Pay particular attention to grip. I have found, for example, that Toelke grips (whip and super D) are generally too small for me, but other people love them.
If you are careful in buying, you will be able to get all or most of your money out of the bow when you sell.
In this fashion, I have found that I like Mohawk Sparrowhawk, Cari-bow Peregrine, and I have a Leon Stewart Slammer on order.
And I thought the search was over, and that I was an R/D guy through and through, but then I bought a beautiful Wes Wallace Mentor recurve -- and guess what, I love that too! And then I decided that I needed to try the new Whippenstick Whipplash, so I have one of those on order. And now it's time to sell something again.
Have fun! It's a great ride.