I am looking to move up to an larger Klipsch 8" Bookshelf.

Since the RB-5 and RB-75 models are scarce, I am considering the RB-35 or the RB-81 II models. I know the RB-81s can handle more power. I am just looking for the best overall sound. It seems the main difference in these two models is the crossover point.
Just wondering if anyone has done an A-B comparison of these two models.